soundwire: bandwidth allocation: improve error messages

soundwire: bandwidth allocation: improve error messages

In rare corner cases, we see an error with the log:

[  838.297840] soundwire sdw-master-1: Compute bus params failed: -22

That's not very useful, there can be two different error conditions
with the same -EINVAL code provided to the caller.

Let's add better dev_err() messages to figure out what went wrong.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20210511054945.29558-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>