soundwire: Add support to use group id for slave devices

Devices with the same group id or broadcast command can be
configured simultaneously. This will help improve the latency
during device configuration. Add support to use group id
for slave device configuration.

Change-Id: I5e86e61a0b5223de6c6471f3f342fe1f387d81ef
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>