ASoC: qcom: lpass-cpu: fix warning on symbol scope

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

lpass-cpu.c:677:22: warning: symbol 'lpass_hdmi_regmap_config'
was not declared. Should it be static?

Fixes: 7cb37b7b ("ASoC: qcom: Add support for lpass hdmi driver")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20201105114100.18647-1-srinivas.kandagatla@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/qcom/lpass-cpu.c

@@ -668,7 +668,7 @@ static bool lpass_hdmi_regmap_volatile(struct device *dev, unsigned int reg)
 	return false;
 }
 
-struct regmap_config lpass_hdmi_regmap_config = {
+static struct regmap_config lpass_hdmi_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,