riscv: Support vendor extensions and xtheadvector

[bjoto]

Pull request for series with
subject: riscv: Support vendor extensions and xtheadvector
version: 2
url: https://patchwork.kernel.org/project/linux-riscv/list/?series=844902

[bjoto]

Upstream branch: a373a36
series: https://patchwork.kernel.org/project/linux-riscv/list/?series=844902
version: 2

Pull request is NOT updated. Failed to apply https://patchwork.kernel.org/project/linux-riscv/list/?series=844902
error message:

Cmd('git') failed due to: exit code(128)
  cmdline: git am -s --3way
  stdout: 'Applying: riscv: cpufeature: Fix thead vector hwcap removal
Applying: dt-bindings: riscv: Add xtheadvector ISA extension description
Applying: dt-bindings: riscv: Add vendorid
Applying: riscv: dts: allwinner: Add xtheadvector to the D1/D1s devicetree
Applying: riscv: Extend cpufeature.c to detect vendor extensions
Patch failed at 0005 riscv: Extend cpufeature.c to detect vendor extensions
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".'
  stderr: 'error: sha1 information is lacking or useless (arch/riscv/kernel/cpufeature.c).
error: could not build fake ancestor
hint: Use 'git am --show-current-patch=diff' to see the failed patch'

conflict: