ASoC: tlv320aic32x4: add a check for devm_clk_get

aic32x4_set_dai_sysclk misses a check for devm_clk_get and may miss the
failure.
Add a check to fix it.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Link: https://lore.kernel.org/r/20191018081448.8486-1-hslester96@gmail.com


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