ASoC: rockchip: spdif: Fully convert to device managed resources

ASoC: rockchip: spdif: Fully convert to device managed resources

This driver mixes device managed resources with unmanaged ones
and (as a lot of them do) gets the order wrong resulting in
potential race condition problems at module removal time. Let's
go to full device managed resources to cleanup the code and get
rid of the potential race condition.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://patch.msgid.link/20260203-rockchip-spdif-cleanup-and-bsp-sync-v2-3-4412016cf577@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>