Linux 3.3: use umode_t for mkdir and create inode ops

Linux 3.3: use umode_t for mkdir and create inode ops

The mkdir and create inode operations have switched to using
umode_t instead of int for the file mode.

Reviewed-on: http://gerrit.openafs.org/6567
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
(cherry picked from commit beafc7f742ebad021bfcbed73884aecedee4e04b)

Change-Id: Ib12c319b55810192c3181f4f2ec340b94a32cb6f
Reviewed-on: http://gerrit.openafs.org/6944
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: Derrick Brashear <shadow@dementix.org>