Certain functions can only act upon one quota type, so refactor those
functions to use switch statements, in keeping with all the other high
level xfs quota api calls.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>