ASoC: msm: add routing for asm loopback on I2S and AUXPCM interfaces

Add routing control to loop the data from primary I2S tx
to rx in asm module. And add the routing to support the asm
loopback on primary AUX PCM interface.

Change-Id: I1f9567617e02e791b2c4f5d4b70a01ad129eeff5
Signed-off-by: Helen Zeng <xiaoyunz@codeaurora.org>