Device nodes can be released after components have bound.

Shortens the lifecycle of the device nodes.  Releases the reference
counts after snd_soc_register_card.
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20211224064719.2031210-5-tzungbi@google.comSigned-off-by: Mark Brown <broonie@kernel.org>