[wrt] Update bcm2708 firmware to support B+/A+
[wrt] Update bcm2708 firmware to support B+/A+

shmick/HeaterMeter,dwright134/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,dwright134/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,dwright134/HeaterMeter,kdakers80/HeaterMeter,CapnBry/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,dwright134/HeaterMeter,dwright134/HeaterMeter,CapnBry/HeaterMeter,kdakers80/HeaterMeter,kdakers80/HeaterMeter,shmick/HeaterMeter,dwright134/HeaterMeter,kdakers80/HeaterMeter,kdakers80/HeaterMeter,kdakers80/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter