Enable HD audio over HDMI.
Tested in Ubuntu-11.10 with ATI Catalyst Proprietary Driver installed.
Change-Id: I013c2c15ee56a7b134d980da1aa1856778a1eb4c
Signed-off-by: Kerry Sheh <shekairui@gmail.com>
Signed-off-by: Kerry Sheh <kerry.she@amd.com>
Reviewed-on: http://review.coreboot.org/450
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>