MAINTAINERS: networking drivers - Add git net-next tree

During the rc period, patches that are not bugfixes
should be done using the net-next tree.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -3836,6 +3836,7 @@ NETWORKING DRIVERS
 L:	netdev@vger.kernel.org
 W:	http://www.linuxfoundation.org/en/Net
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.git
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6.git
 S:	Odd Fixes
 F:	drivers/net/
 F:	include/linux/if_*