soc: soundwire: Update bus clock frequency based on usecase

Some usecases need soundwire bus clock frequency to run at
lower clock rate for better power and performance. Update
soundwire bus clock frequency based on usecase.

Change-Id: I2e786d9f5d5d2ec3841daa934802eeafa79a8f6c
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>