brcm2708-bcm2708/-bcm2709: remove unnecessary package list

These packages are included by OpenWrt by default on this target and don't
need to be specified manually.

targets/brcm2708-bcm2708/profiles.mk

-$(eval $(call GluonProfile,RaspberryPi,brcm2708-gpu-fw kmod-usb-hid kmod-sound-core kmod-sound-arm-bcm2835))
+$(eval $(call GluonProfile,RaspberryPi))
 $(eval $(call GluonProfileFactorySuffix,RaspberryPi,-vfat-ext4,.img.gz))
 $(eval $(call GluonProfileSysupgradeSuffix,RaspberryPi))
 $(eval $(call GluonModel,RaspberryPi,sdcard,raspberry-pi))

targets/brcm2708-bcm2709/profiles.mk

-$(eval $(call GluonProfile,RaspberryPi2,brcm2708-gpu-fw kmod-usb-hid kmod-sound-core kmod-sound-arm-bcm2835))
+$(eval $(call GluonProfile,RaspberryPi2))
 $(eval $(call GluonProfileFactorySuffix,RaspberryPi2,-vfat-ext4,.img.gz))
 $(eval $(call GluonProfileSysupgradeSuffix,RaspberryPi2))
 $(eval $(call GluonModel,RaspberryPi2,sdcard,raspberry-pi-2))