UPSTREAM: arm64: mm: remove pointless PAGE_MASKing

UPSTREAM: arm64: mm: remove pointless PAGE_MASKing

As pgd_offset{,_k} shift the input address by PGDIR_SHIFT, the sub-page
bits will always be shifted out. There is no need to apply PAGE_MASK
before this.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Jeremy Linton <jeremy.linton@arm.com>
Cc: Laura Abbott <labbott@fedoraproject.org>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: rework-pagetable

(cherry picked from commit e2c30ee320eb96304896c7ab84499e5bc5e5fb6e)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I86d3438aecf7295d5895e1430c1e19fbc82c9719