ANDROID: fix build issue in security/selinux/avc.c

This came up due to interaction with the backport of
commit 6b6bc620 ("selinux: wrap AVC state") and 4.14.172 causing a
build error.

Bug: 140252993
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I894f4e8144c1ad28fbbea114ff830a730497b05d