ASoC: ti: davinci-mcasp: remove always zero of davinci_mcasp_get_dt_params

ASoC: ti: davinci-mcasp: remove always zero of davinci_mcasp_get_dt_params

davinci_mcasp_get_dt_params alway return zero, and its return value
could be ignored by the caller. So make it 'void' type to avoid the
check its return value.

Fixes: a32d8aaa04ff7 ("ASoC: ti: davinci-mcasp: Support for auxclk-fs-ratio")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20201102103428.32678-1-zhangqilong3@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>