Revert "UPSTREAM: mm, page_alloc: spread allocations across zones before introducing fragmentation"

This reverts commit 8ad4b225.

Reason for revert: revert customized code
Bug: 140544941
Test: boot
Signed-off-by: Minchan Kim <minchan@google.com>
Signed-off-by: Martin Liu <liumartin@google.com>
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I340fb8af98b3f6e033fd5463b082fbca43abe941