xfs: Code cleanup and removal of some typedef usage

In preparation for combined pquota/gquota support, for the sake
of readability, do some code cleanup surrounding the affected
code.

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

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

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

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

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

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

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

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