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>

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 53c56a9..1942913 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1398,7 +1398,7 @@
 
 	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)