ASoC: lpass-ipq806x: Staticise local symbols

ipq806x_data is not used outside this file, so it can be static.
Fixes the following sparse warning:

	sound/soc/qcom/lpass-ipq806x.c:76:22: warning: symbol 'ipq806x_data'
		was not declared. Should it be static?
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/qcom/lpass-ipq806x.c

@@ -73,7 +73,7 @@ static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
 	return 0;
 }
 
-struct lpass_variant ipq806x_data = {
+static struct lpass_variant ipq806x_data = {
 	.i2sctrl_reg_base	= 0x0010,
 	.i2sctrl_reg_stride	= 0x04,
 	.i2s_ports		= 5,