MAINTAINERS: Remove Yotam from mlxfw

Provide a mailing list for maintenance of the module instead.
Signed-off-by: NYuval Mintz <yuvalm@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -8743,7 +8743,7 @@ Q:	http://patchwork.ozlabs.org/project/netdev/list/
 F:	drivers/net/ethernet/mellanox/mlxsw/
 
 MELLANOX FIRMWARE FLASH LIBRARY (mlxfw)
-M:	Yotam Gigi <yotamg@mellanox.com>
+M:	mlxsw@mellanox.com
 L:	netdev@vger.kernel.org
 S:	Supported
 W:	http://www.mellanox.com