xfs: Add support for the Q_XGETQSTATV

For XFS, add support for Q_XGETQSTATV quotactl command.

Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Reviewed-by: Rich Johnston <rjohnston@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

diff --cc fs/xfs/xfs_qm.h
Simple merge

diff --cc fs/xfs/xfs_qm_syscalls.c
Simple merge

diff --cc fs/xfs/xfs_quotaops.c
Simple merge