xfs: refactor xfs_qm_dqtobp and xfs_qm_dqalloc

Separate the disk dquot read and allocation functionality into
two helper functions, then refactor dqread to call them directly.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
1 file changed