Merge branch 'for-next/kexec' into aarch64/for-next/core

Merge in kexec_file_load() support from Akashi Takahiro.

diff --cc arch/arm64/Kconfig
Simple merge

diff --cc arch/arm64/include/asm/cpufeature.h
Simple merge

diff --cc arch/arm64/kernel/Makefile
Simple merge

diff --cc arch/arm64/kernel/head.S
Simple merge

diff --cc arch/arm64/kernel/image.h
Simple merge