ASoC: ti: j721e-evm: Fix missing unlock on error in j721e_audio_hw_params()

ASoC: ti: j721e-evm: Fix missing unlock on error in j721e_audio_hw_params()

Add the missing unlock before return from function j721e_audio_hw_params()
in the error handling case.

Fixes: e7e57764f5db ("ASoC: ti: Add custom machine driver for j721e EVM (CPB and IVI)")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200703030910.75047-1-weiyongjun1@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>