Revert "FROMLIST: overlayfs: internal getxattr operations without sepolicy checking"

This reverts commit 4aa24aec as it was
not upstream and causes problems with the overlayfs upstream merge
point.  It needs to be added back "soon".

Cc: Mark Salyzyn <salyzyn@android.com>
Cc: kernel-team@android.com
Cc: Mark Salyzyn <salyzyn@google.com>
Bug: 133515582
Bug: 136124883
Bug: 129319403
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ic429c8b13181fbaaf7e060b463e86bb9a06ad66e