xfs: stop using q_core warning counters in the quota code

Add warning counter fields to the incore dquot, and use that instead of
the ones in qcore.  This eliminates a bunch of endian conversions and
will eventually allow us to remove qcore entirely.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>

fs/xfs/xfs_dquot.h

@@ -37,6 +37,14 @@ struct xfs_dquot_res {
 	/* Absolute and preferred limits. */
 	xfs_qcnt_t		hardlimit;
 	xfs_qcnt_t		softlimit;
+
+	/*
+	 * For root dquots, this is the maximum number of warnings that will
+	 * be issued for this quota type.  Otherwise, this is the number of
+	 * warnings issued against this quota.  Note that none of this is
+	 * implemented.
+	 */
+	xfs_qwarncnt_t		warnings;
 };
 
 /*