soundwire: intel: cleanups for indirections/logs

The code can be simplified a bit to have a more consistent use of
'dev' and 'bus', as well as move definitions around. This will help
make the major changes in follow-up patches easier to review.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200531182102.27840-2-yung-chuan.liao@linux.intel.com


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