brcm2708: Add wifi driver, firmware and NVRAM for RPi1

Apparently there are RPi1 devices with BRCM43430 wifi, such as the
Pi Zero W. Add the necessary packages for that to the image generated
for those boards as well.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

target/linux/brcm2708/image/Makefile

@@ -57,6 +57,7 @@ define Device/rpi
   DEVICE_TITLE := Raspberry Pi B/B+/CM/Zero/ZeroW
   DEVICE_DTS := bcm2708-rpi-b bcm2708-rpi-b-plus bcm2708-rpi-cm bcm2708-rpi-0-w
   SUPPORTED_DEVICES := rpi-b rpi-b-plus rpi-cm rpi-zero rpi-zero-w raspberrypi,model-b raspberrypi,model-b-plus raspberrypi,compute-module-1 raspberrypi,model-b-rev2 raspberrypi,model-zero raspberrypi,model-zero-w
+  DEVICE_PACKAGES := brcmfmac-firmware-43430-sdio brcmfmac-board-rpi2 kmod-brcmfmac wpad-mini
 endef
 ifeq ($(SUBTARGET),bcm2708)
   TARGET_DEVICES += rpi