Merge branch 'x86/pti' into x86/mm, to pick up dependencies

Makefile

arch/x86/Kconfig

arch/x86/Makefile

arch/x86/entry/calling.h

arch/x86/entry/entry_32.S

arch/x86/entry/entry_64.S

arch/x86/entry/entry_64_compat.S

arch/x86/entry/syscalls/syscall_32.tbl

arch/x86/entry/vsyscall/vsyscall_64.c

arch/x86/ia32/sys_ia32.c

arch/x86/include/asm/apm.h

arch/x86/include/asm/asm-prototypes.h

arch/x86/include/asm/cpufeatures.h

arch/x86/include/asm/efi.h

arch/x86/include/asm/microcode.h

arch/x86/include/asm/mmu_context.h

arch/x86/include/asm/nospec-branch.h

arch/x86/include/asm/paravirt.h

arch/x86/include/asm/paravirt_types.h

arch/x86/include/asm/pgtable.h