soundwire: stream: remove redundant pr_err traces

soundwire: stream: remove redundant pr_err traces

Only keep pr_err to flag critical configuration errors that will
typically only happen during system integration.

For errors on prepare/deprepare/enable/disable, the caller can do a
much better job with more information on the DAI and device that
caused the issue.

Suggested-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200108175438.13121-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>