fstests: remove obsolete xfs ioctl typedef usage

Convert 'xfs_foo_t' typedef usage to 'struct xfs_foo' in preparation
for changes to some of the xfs ioctls.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
5 files changed