lantiq: Refresh kernel 4.14 configuration

This adds two configuration options which are getting automatically
added.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/lantiq/config-4.14

@@ -75,6 +75,7 @@ CONFIG_HAS_IOMEM=y
 CONFIG_HAS_IOPORT_MAP=y
 # CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
 # CONFIG_HAVE_ARCH_BITREVERSE is not set
+CONFIG_HAVE_ARCH_COMPILER_H=y
 CONFIG_HAVE_ARCH_JUMP_LABEL=y
 CONFIG_HAVE_ARCH_KGDB=y
 CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
@@ -133,6 +134,7 @@ CONFIG_MDIO_BUS=y
 CONFIG_MDIO_DEVICE=y
 CONFIG_MFD_CORE=y
 CONFIG_MFD_SYSCON=y
+CONFIG_MIGRATION=y
 CONFIG_MIPS=y
 CONFIG_MIPS_ASID_BITS=8
 CONFIG_MIPS_ASID_SHIFT=0