rk_spdif_runtime_resume() may have called clk_prepare_enable() before return
from failed branches, add missing clk_disable_unprepare() in this case.

Fixes: f874b80e ("ASoC: rockchip: Add rockchip SPDIF transceiver driver")
Signed-off-by: Wang Jingjin <wangjingjin1@huawei.com>
Link: https://lore.kernel.org/r/20221208063900.4180790-1-wangjingjin1@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>