Merge branch 'x86/mm' into efi/core

This commit in x86/mm changed EFI code:

   116fef64: x86/mm/dump_pagetables: Add the EFI pagetable to the debugfs 'page_tables' directory

So merge in that commit plus its dependencies, before continuing with
EFI work.

Signed-off-by: Ingo Molnar <mingo@kernel.org>