x86: rename PTE_MASK to PTE_PFN_MASK

Status from this message: Applied to tip/x86/cleanups anyway. Rusty will find out himself how bad

Get series with b4

b4 am [email protected]

Versions newest first

#	Subject and files	Size	Replies	Applied
1/2	x86: rename PTE_MASK to PTE_PFN_MASK`arch/x86/mm/dump_pagetables.c` `arch/x86/xen/enlighten.c` `arch/x86/xen/mmu.c` +7 more	+0 -0	9 replies
2/2	x86: add PTE_FLAGS_MASK`arch/x86/mm/dump_pagetables.c` `arch/x86/xen/mmu.c` `include/asm-x86/page.h` +2 more	+0 -0	0 replies

No Reviewed-by, Acked-by or Tested-by trailers for v1 yet.