ASoC: msm: add routing for ASM loopback on I2S interface

Add routing controls to loop data from Tertiary I2S Tx to
Rx and BT SCO Tx to Primary I2S Rx to support HFP feature.
Tertiary I2S Tx is used for input and Primary I2S Rx for
output for this feature.

Change-Id: I3ce436ad7fc515f510bf3b52c602b35ca78422d3
Signed-off-by: Satya Krishna Pindiproli <satyak@codeaurora.org>