ASoC: adau17x1: Remove redundant null check before clk_disable_unprepare
Because clk_disable_unprepare() already checked NULL clock parameter, so the additional check is unnecessary, just remove it. Signed-off-by: Xu Wang <vulab@iscas.ac.cn> Link: https://lore.kernel.org/r/20210108084456.6603-1-vulab@iscas.ac.cnSigned-off-by: Mark Brown <broonie@kernel.org>
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