ASoC: Intel: make const arrays static, reduces object code size

Don't populate the const arrays on the stack but instead make
it static. Makes the object code smaller, for example:

Before:
   text    data     bss     dec     hex filename
  14107    8832     224   23163    5a7b bytcht_es8316.o

After:
   text    data     bss     dec     hex filename
  14015    8896     224   23135    5a5f bytcht_es8316.o

(gcc version 8.2.0 x86_64)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/bytcht_es8316.c

@@ -437,7 +437,7 @@ static const struct acpi_gpio_mapping byt_cht_es8316_gpios[] = {
 
 static int snd_byt_cht_es8316_mc_probe(struct platform_device *pdev)
 {
-	const char * const mic_name[] = { "in1", "in2" };
+	static const char * const mic_name[] = { "in1", "in2" };
 	struct byt_cht_es8316_private *priv;
 	struct device *dev = &pdev->dev;
 	struct snd_soc_acpi_mach *mach;

sound/soc/intel/boards/bytcr_rt5640.c

@@ -1149,7 +1149,7 @@ struct acpi_chan_package {   /* ACPICA seems to require 64 bit integers */
 
 static int snd_byt_rt5640_mc_probe(struct platform_device *pdev)
 {
-	const char * const map_name[] = { "dmic1", "dmic2", "in1", "in3" };
+	static const char * const map_name[] = { "dmic1", "dmic2", "in1", "in3" };
 	const struct dmi_system_id *dmi_id;
 	struct byt_rt5640_private *priv;
 	struct snd_soc_acpi_mach *mach;

sound/soc/intel/boards/bytcr_rt5651.c

@@ -919,7 +919,7 @@ struct acpi_chan_package {   /* ACPICA seems to require 64 bit integers */
 
 static int snd_byt_rt5651_mc_probe(struct platform_device *pdev)
 {
-	const char * const mic_name[] = { "dmic", "in1", "in2", "in12" };
+	static const char * const mic_name[] = { "dmic", "in1", "in2", "in12" };
 	struct byt_rt5651_private *priv;
 	struct snd_soc_acpi_mach *mach;
 	struct device *codec_dev;