rds: spin_lock_irq() is not nestable

This is basically just a cleanup.  IRQs were disabled on the previous
line so we don't need to do it again here.  In the current code IRQs
would get turned on one line earlier than intended.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index 8f6e221..b5a8841 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -171,9 +171,9 @@
 	BUG_ON(list_empty(&ic->ib_node));
 	list_del(&ic->ib_node);
 
-	spin_lock_irq(&rds_ibdev->spinlock);
+	spin_lock(&rds_ibdev->spinlock);
 	list_add_tail(&ic->ib_node, &rds_ibdev->conn_list);
-	spin_unlock_irq(&rds_ibdev->spinlock);
+	spin_unlock(&rds_ibdev->spinlock);
 	spin_unlock_irq(&ib_nodev_conns_lock);
 
 	ic->rds_ibdev = rds_ibdev;