ASoC: dwc-i2s: Handle errors for clk_enable

As the potential failure of the clk_enable(),
it should be better to check it, as same as clk_prepare_enable().

Fixes: c9afc183

 ("ASoC: dwc: Disallow building designware_pcm as a module")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20220301084742.3751939-1-jiasheng@iscas.ac.cn


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