ASoC: swr-haptics: Avoid soundwire resume during subsystem restart

Soundwire register write from haptics resumes soundwire master during
subsystem down. Avoid soundwire slave register writes when the subsystem
is already down.

Change-Id: I78304b84bfaf882df1b76dbd04a8e063185d3963
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>