ANDROID: vfs: Fix permission2

Fix permission2 breakage introduced by upstream commit
af7bd4dc ("vfs: create vfs helper vfs_tmpfile()") changes.

Fixes: Change-Id: I9d416e3b8b6eca84ef3e336bd2af89ddd51df6ca
       ("ANDROID: vfs: Add permission2 for filesystems with per mount permissions")
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>