ASoC: hisilicon: fix missing clk_disable_unprepare() on error in hi6210_i2s_startup()

After calling clk_prepare_enable(), clk_disable_unprepare() need
be called when calling clk_set_rate() failed.

Fixes: 0bf750f4 ("ASoC: hisilicon: Add hi6210 i2s audio driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210518044514.607010-1-yangyingliang@huawei.com


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