stingray: init.stingray.rc: Bluetooth PCM interface is slave

On Stingray, we will use the Broadcomm SCO PCM interface as slave, and
the Tegra I2S (DAP4) as Master.  This will avoid synchronization
requirements for the start/stop of SCO and the start/stop of audio
playback and capture.

Change-Id: I550b3b108caad4bbc7927ac7abaea4b188ea843c
1 file changed