ASoC: mediatek: common: fix device and OF node leak

Make sure to drop the references to the accdet OF node and platform
device taken by of_parse_phandle() and of_find_device_by_node() after
looking up the sound component during probe.

Fixes: cf536e26 ("ASoC: mediatek: common: Handle mediatek,accdet property")
Cc: stable@vger.kernel.org	# 6.15
Cc: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20250722092542.32754-1-johan@kernel.org


Signed-off-by: Mark Brown <broonie@kernel.org>