MAINAINTERS: Add Doug as GENET maintainer

Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -2897,6 +2897,7 @@ F:	drivers/gpio/gpio-brcmstb.c
 F:	Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
 
 BROADCOM GENET ETHERNET DRIVER
+M:	Doug Berger <opendmb@gmail.com>
 M:	Florian Fainelli <f.fainelli@gmail.com>
 L:	netdev@vger.kernel.org
 S:	Supported