[ALSA] HDA-Intel - Add support for RV6xx HDMI audio

This patch is to add R6xx HDMI audio support. Meanwhile, the device ID
in the previous patch is changed.
I have checked the patch from Herton Ronaldo Krzesinski, it's right as
our spec said. :)

Signed-off-by: Wolke Liu <Wolke.Liu@amd.com>
Signed-off-by: Andrea Zhang <Andrea.Zhang@amd.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>