To improve readability, reword several local variables to better match
their counterparts in declarations of soc-dai.h. For similar reasons,
wording for few comments is streamlined while redundant comments are
removed.

No functional changes.
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20230629112449.1755928-9-cezary.rojewski@intel.comSigned-off-by: Mark Brown <broonie@kernel.org>