db845c: audio: Fix HDMI mixer control

"QUAT_MI2S_RX Audio Mixer MultiMedia2" needs
to be enabled for HDMI audio to work.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I1f2081e4354f039afd2a57a6a36d3afe021b420b
1 file changed