soundwire: stream: group sdw_port and sdw_master/slave_port functions

soundwire: stream: group sdw_port and sdw_master/slave_port functions

re-group all the helpers in one location with a code move. For
consistency the 'slave' helpers are placed before the 'master'
helpers.

Also remove unused arguments and rename the 'release' function to
'free' for consistency.

No functional change in this patch.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220126011715.28204-9-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>