Revert "iommu/amd: Pass gfp flags to iommu_map_page() in amd_iommu_map()"

This reverts commit 8b47e324 which is
commit 3057fb9377eb5e73386dd0d8804bf72bdd23e391 upstream.

It is needed to be reverted as a dependent change on it is being
reverted to preserve the Android kernel abi.

Bug: 161946584
Change-Id: Ida9dc39ce7faf2a33aae9bde9741fdf25e2f0303
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>