ASoC: q6afe-clocks: fix warning on symbol scope

ASoC: q6afe-clocks: fix warning on symbol scope

This patch fixes below warning when module is compiled with W=1 C=1

sound/soc/qcom/qdsp6/q6afe-clocks.c:122:18: warning: symbol 'q6afe_clks'
was not declared. Should it be static?

Fixes: 520a1c396d196 ("ASoC: q6afe-clocks: add q6afe clock controller")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20201105114435.22860-1-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>