audio: Enable External HDMI support

-For HDMI compliance, channel status bits
should be configured for the external HDMI chip.
-Hence HAL based on the output format i.e compressed
or LPCM populates the channel_status information
and passes it to the dai-driver which in turn
configures the external HDMI chip

Change-Id: Ibf192492d259a722070a08f4764fde9498dd268d