sdm670: Add mixer control and update affine qos value

Add mixer control for MultiMedia5_RX QOS Vote.

Fix qos value to 300 micro seconds to prevent core
from going into low power mode when low latency
session is active. Also pin this qos to core 1
& core 2 where audio and glink threads are
running to let other cores to go to low power
modes if possible.

Change-Id: I64ae9db2adbaf6f34d1ed8c8e079fa4006146b73
Signed-off-by: Revathi Uddaraju <revathiu@codeaurora.org>
Signed-off-by: Soumya Managoli <smanag@codeaurora.org>