soundwire: cadence: handle error cases with CONFIG_UPDATE

config_update() may time out or cannot be use in ClockStopMode

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200317163329.25501-5-pierre-louis.bossart@linux.intel.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>