linux: add more radeon firmwares

Signed-off-by: Stephan Raue <stephan@openelec.tv>
dvb-firmware: update to dvb-firmware-0.0.44

Signed-off-by: Stephan Raue <stephan@openelec.tv>
misc-firmware: update to misc-firmware-0.0.12

Signed-off-by: Stephan Raue <stephan@openelec.tv>