xfs: Fix incorrect positive ENOMEM return

added a positive error return value.

This value filters up through the return layers and should be
negative as the other return values are in the same function.

Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_super.c

@@ -1398,7 +1398,7 @@ xfs_init_percpu_counters(
 
 	error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
 	if (error)
-		return ENOMEM;
+		return -ENOMEM;
 
 	error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
 	if (error)