MAINTAINERS: Assign maintainer to Mellanox mlx4 core and IB drivers

The driver was written originally by Roland Dreier, currently there's
no official maintainer. Yishai steps in as maintainer.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Roland Dreier <roland@kernel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

MAINTAINERS

@@ -7048,6 +7048,25 @@ W:	http://linuxtv.org
 S:	Odd Fixes
 F:	drivers/media/radio/radio-miropcm20*
 
+MELLANOX MLX4 core VPI driver
+M:	Yishai Hadas <yishaih@mellanox.com>
+L:	netdev@vger.kernel.org
+L:	linux-rdma@vger.kernel.org
+W:	http://www.mellanox.com
+Q:	http://patchwork.ozlabs.org/project/netdev/list/
+S:	Supported
+F:	drivers/net/ethernet/mellanox/mlx4/
+F:	include/linux/mlx4/
+
+MELLANOX MLX4 IB driver
+M:	Yishai Hadas <yishaih@mellanox.com>
+L:	linux-rdma@vger.kernel.org
+W:	http://www.mellanox.com
+Q:	http://patchwork.kernel.org/project/linux-rdma/list/
+S:	Supported
+F:	drivers/infiniband/hw/mlx4/
+F:	include/linux/mlx4/
+
 MELLANOX MLX5 core VPI driver
 M:	Matan Barak <matanb@mellanox.com>
 M:	Leon Romanovsky <leonro@mellanox.com>