? I've not personally tried it, but it's definately turned on in the config for the Mk1. It's not compiled in the Mk2 however.

jade:~/empeg/hijack/v300/arch/arm/def-configs$ grep CONFIG_RADIO_EMPEG empeg-car1
CONFIG_RADIO_EMPEG=y

jade:~/empeg/hijack/v300/arch/arm/def-configs$ grep CONFIG_RADIO_EMPEG empeg-car2

jade:~/empeg/hijack/v300/drivers/char$ grep CONFIG_RADIO_EMPEG Config.in
dep_tristate 'empeg-car FM Radio support' CONFIG_RADIO_EMPEG $CONFIG_VIDEO_DEV