soc: swr-mstr: Support to execute commands on command ignore

If the optional commands/registers in soundwire slave(s) are not
implemented, then soundwire bus will ignore the corresponding
commands and executes the next commands in queue.

Change-Id: I24dd929975218a150717f03f5c17c2be173a5005
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>