common: remove old ioctl typedef usage

Convert old xfs_foo_t typedef usage to struct xfs_foo to prepare for the
removal of old ioctl typedefs.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
[sandeen: minor whitespace tweaks]
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
9 files changed