RDMA/amso1100: Fix unitialized pseudo_netdev accessed in c2_register_device

Rework some load-time error handling: c2_register_device() leaked when
it failed, and the function that called it didn't check the return code.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/amso1100/c2.c b/drivers/infiniband/hw/amso1100/c2.c
index 9e7bd94..27fe242 100644
--- a/drivers/infiniband/hw/amso1100/c2.c
+++ b/drivers/infiniband/hw/amso1100/c2.c
@@ -1155,7 +1155,8 @@
 		goto bail10;
 	}
 
-	c2_register_device(c2dev);
+	if (c2_register_device(c2dev))
+		goto bail10;
 
 	return 0;