ASoC: ti: davinci-i2s: Add check for clk_enable()

As the potential failure of the clk_enable(),
it should be better to check it and return error
if fails.

Fixes: 5f9a50c3

 ("ASoC: Davinci: McBSP: add device tree support for McBSP")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20220228031540.3571959-1-jiasheng@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>