Revert "kernel: update guest kernel to 4.19.8 on aarch64 "

Reverts #269

The added kernel patch doesn't apply and is causing all CI to fail. FYI, the current guest kernel version is 4.14.67. Please rebase and re-submit your PR cleanly @Pennyzct.

e.g., http://jenkins.katacontainers.io/job/kata-containers-runtime-centos-7-4-PR/995/console

NFO: Applying patch /tmp/jenkins/workspace/kata-containers-runtime-centos-7-4-PR/go/src/github.com/kata-containers/packaging/kernel/patches/0003-backport-Arm64-KVM-Dynamic-IPA-and-52bit-IPA-support.patch
patching file arch/arm/include/asm/kvm_arm.h
patching file arch/arm/include/asm/kvm_host.h
Hunk #1 succeeded at 266 (offset -7 lines).
Hunk #2 succeeded at 314 with fuzz 2 (offset -40 lines).
patching file arch/arm/include/asm/kvm_mmu.h
Hunk #1 FAILED at 35.
Hunk #2 succeeded at 47 with fuzz 2 (offset -5 lines).
Hunk #3 succeeded at 266 with fuzz 2 (offset -96 lines).
1 out of 3 hunks FAILED -- saving rejects to file arch/arm/include/asm/kvm_mmu.h.rej
patching file arch/arm/include/asm/stage2_pgtable.h
patching file arch/arm64/include/asm/cpufeature.h
Hunk #1 FAILED at 262.
Hunk #2 succeeded at 284 (offset -246 lines).
1 out of 2 hunks FAILED -- saving rejects to file arch/arm64/include/asm/cpufeature.h.rej
patching file arch/arm64/include/asm/kvm_arm.h
Hunk #1 succeeded at 102 (offset -5 lines).
Hunk #2 succeeded at 116 (offset -5 lines).
Hunk #3 succeeded at 305 (offset -7 lines).
patching file arch/arm64/include/asm/kvm_asm.h
Hunk #1 succeeded at 27 (offset -3 lines).
Hunk #2 FAILED at 73.
1 out of 2 hunks FAILED -- saving rejects to file arch/arm64/include/asm/kvm_asm.h.rej
patching file arch/arm64/include/asm/kvm_host.h
Hunk #1 succeeded at 48 (offset -5 lines).
Hunk #2 FAILED at 61.
Hunk #3 succeeded at 399 with fuzz 2 (offset -41 lines).
Hunk #4 FAILED at 503.
2 out of 4 hunks FAILED -- saving rejects to file arch/arm64/include/asm/kvm_host.h.rej
patching file arch/arm64/include/asm/kvm_hyp.h
patching file arch/arm64/include/asm/kvm_mmu.h
Hunk #1 succeeded at 154 (offset 13 lines).
Hunk #2 succeeded at 229 with fuzz 1 (offset -17 lines).
Hunk #3 succeeded at 409 with fuzz 2 (offset -110 lines).
patching file arch/arm64/include/asm/stage2_pgtable-nopmd.h
patching file arch/arm64/include/asm/stage2_pgtable-nopud.h
patching file arch/arm64/include/asm/stage2_pgtable.h
patching file arch/arm64/kvm/guest.c
Hunk #1 succeeded at 305 (offset -86 lines).
patching file arch/arm64/kvm/hyp-init.S
Hunk #1 FAILED at 65.
1 out of 1 hunk FAILED -- saving rejects to file arch/arm64/kvm/hyp-init.S.rej
patching file arch/arm64/kvm/hyp/Makefile
Hunk #1 succeeded at 18 (offset -1 lines).
patching file arch/arm64/kvm/hyp/s2-setup.c
Reversed (or previously applied) patch detected! Assume -R? [n]
Apply anyway? [n]
Skipping patch.
1 out of 1 hunk ignored -- saving rejects to file arch/arm64/kvm/hyp/s2-setup.c.rej
patching file arch/arm64/kvm/hyp/switch.c
Hunk #1 FAILED at 198.
Hunk #2 succeeded at 226 (offset -37 lines).
1 out of 2 hunks FAILED -- saving rejects to file arch/arm64/kvm/hyp/switch.c.rej
patching file arch/arm64/kvm/hyp/tlb.c
Hunk #1 succeeded at 29 (offset -1 lines).
Hunk #2 succeeded at 38 (offset -1 lines).
patching file arch/arm64/kvm/reset.c
Hunk #4 FAILED at 86.
Hunk #5 succeeded at 133 (offset -4 lines).
1 out of 5 hunks FAILED -- saving rejects to file arch/arm64/kvm/reset.c.rej
patching file include/linux/irqchip/arm-gic-v3.h
Hunk #1 succeeded at 374 (offset -14 lines).
patching file include/uapi/linux/kvm.h
Hunk #1 succeeded at 739 (offset -11 lines).
Hunk #2 FAILED at 962.
1 out of 2 hunks FAILED -- saving rejects to file include/uapi/linux/kvm.h.rej
patching file virt/kvm/arm/arm.c
Hunk #1 succeeded at 115 (offset -5 lines).
Hunk #2 succeeded at 207 (offset -6 lines).
Hunk #3 succeeded at 236 (offset -6 lines).
Hunk #4 succeeded at 463 (offset -35 lines).
Hunk #5 FAILED at 546.
Hunk #6 succeeded at 1164 with fuzz 2 (offset -145 lines).
Hunk #7 succeeded at 1261 (offset -147 lines).
1 out of 7 hunks FAILED -- saving rejects to file virt/kvm/arm/arm.c.rej
patching file virt/kvm/arm/mmu.c
Hunk #1 succeeded at 43 with fuzz 2 (offset -2 lines).
Hunk #2 succeeded at 147 (offset -2 lines).
Hunk #3 succeeded at 216 (offset -35 lines).
Hunk #4 succeeded at 226 (offset -35 lines).
Hunk #5 succeeded at 245 (offset -35 lines).
Hunk #6 succeeded at 255 (offset -35 lines).
Hunk #7 succeeded at 272 (offset -35 lines).
Hunk #8 succeeded at 371 with fuzz 2 (offset 40 lines).
Hunk #9 FAILED at 340.
Hunk #10 FAILED at 370.
Hunk #11 FAILED at 388.
Hunk #12 FAILED at 408.
Hunk #13 succeeded at 753 (offset -143 lines).
Hunk #14 succeeded at 842 (offset -143 lines).
Hunk #15 succeeded at 850 (offset -143 lines).
Hunk #16 succeeded at 859 (offset -143 lines).
Hunk #17 succeeded at 881 (offset -143 lines).
Hunk #18 succeeded at 1024 (offset -182 lines).
Hunk #19 succeeded at 1114 (offset -188 lines).
Hunk #20 succeeded at 1148 (offset -188 lines).
Hunk #21 succeeded at 1176 (offset -188 lines).
Hunk #22 succeeded at 1190 (offset -188 lines).
Hunk #23 succeeded at 1333 (offset -196 lines).
Hunk #24 succeeded at 1552 (offset -220 lines).
Hunk #25 succeeded at 1852 (offset -219 lines).
4 out of 25 hunks FAILED -- saving rejects to file virt/kvm/arm/mmu.c.rej
patching file virt/kvm/arm/vgic/vgic-its.c
Hunk #1 succeeded at 233 (offset -8 lines).
Hunk #2 succeeded at 696 (offset -56 lines).
Hunk #3 succeeded at 721 (offset -56 lines).
Hunk #4 succeeded at 736 (offset -56 lines).
Hunk #5 succeeded at 746 (offset -56 lines).
Hunk #6 succeeded at 1214 (offset -80 lines).
Hunk #7 succeeded at 1232 (offset -80 lines).
Hunk #8 succeeded at 1279 (offset -80 lines).
Hunk #9 succeeded at 2135 (offset -82 lines).
Hunk #10 succeeded at 2207 (offset -82 lines).
Hunk #11 succeeded at 2256 (offset -82 lines).
patching file virt/kvm/arm/vgic/vgic-mmio-v3.c
Hunk #1 succeeded at 326 (offset -38 lines).
Hunk #2 succeeded at 343 (offset -38 lines).
Build step 'Execute shell' marked build as failure
Performing Post build task...
Match found for :.* : True
Logical operation result is TRUE
Running script : #!/bin/bash

Fixes: #296
Signed-off-by: Peng Tao <bergwolf@gmail.com>