Revert "arm64/mm: define ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT"

This reverts commit bcca0756.

Reason for revert: remove SPF non upstream code
Bug: 140544941
Test: boot
Change-Id: Id97756b85be0a1690e000fd24f125f21915d20da
Signed-off-by: Martin Liu <liumartin@google.com>
[dereference23: Forward port to msm-5.4]
Signed-off-by: Alexander Winkowski <dereference23@outlook.com>