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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>