xfs: clean up MIN/MAX

Get rid of the MIN/MAX macros and just use the native min/max macros
directly in the XFS code.

Signed-Off-By: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index e630778..5e56f3b 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1629,8 +1629,8 @@ xlog_grant_push_ail(
 	 * log, and 256 blocks.
 	 */
 	free_threshold = BTOBB(need_bytes);
-	free_threshold = MAX(free_threshold, (log->l_logBBsize >> 2));
-	free_threshold = MAX(free_threshold, 256);
+	free_threshold = max(free_threshold, (log->l_logBBsize >> 2));
+	free_threshold = max(free_threshold, 256);
 	if (free_blocks >= free_threshold)
 		return;