MAINTAINERS: update FORCEDETH MAINTAINERS info

Many FORCEDETH NICs are used in our hosts. Several bugs are fixed and
some features are developed for FORCEDETH NICs. And I have been
reviewing patches for FORCEDETH NIC for several months. Mark me as the
FORCEDETH NIC maintainer. I will send out the patches and maintain
FORCEDETH NIC.

Signed-off-by: Rain River <rain.1986.08.12@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -649,6 +649,12 @@ M:	Lino Sanfilippo <LinoSanfilippo@gmx.de>
 S:	Maintained
 F:	drivers/net/ethernet/alacritech/*
 
+FORCEDETH GIGABIT ETHERNET DRIVER
+M:	Rain River <rain.1986.08.12@gmail.com>
+L:	netdev@vger.kernel.org
+S:	Maintained
+F:	drivers/net/ethernet/nvidia/*
+
 ALCATEL SPEEDTOUCH USB DRIVER
 M:	Duncan Sands <duncan.sands@free.fr>
 L:	linux-usb@vger.kernel.org