xfs: convert log item tracepoint flags to unsigned.

5.18 w/ std=gnu11 compiled with gcc-5 wants flags stored in unsigned
fields to be unsigned.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Chandan Babu R <chandan.babu@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_trans.h

@@ -58,10 +58,10 @@ struct xfs_log_item {
 #define	XFS_LI_DIRTY	3	/* log item dirty in transaction */
 
 #define XFS_LI_FLAGS \
-	{ (1 << XFS_LI_IN_AIL),		"IN_AIL" }, \
-	{ (1 << XFS_LI_ABORTED),	"ABORTED" }, \
-	{ (1 << XFS_LI_FAILED),		"FAILED" }, \
-	{ (1 << XFS_LI_DIRTY),		"DIRTY" }
+	{ (1u << XFS_LI_IN_AIL),	"IN_AIL" }, \
+	{ (1u << XFS_LI_ABORTED),	"ABORTED" }, \
+	{ (1u << XFS_LI_FAILED),	"FAILED" }, \
+	{ (1u << XFS_LI_DIRTY),		"DIRTY" }
 
 struct xfs_item_ops {
 	unsigned flags;