ASoC: rt5670 : Add ACPI match ID for Intel CHT/BSW platforms

This patch adds the ACPI match ID for rt5670/5672 codec.
So on Intel CherryTrail/Braswell platforms, the codec can be enumerated from
ACPI and depends on ACPI to get platform-specific info and power saving.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Reviewed-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5670.c

@@ -16,6 +16,7 @@
 #include <linux/pm.h>
 #include <linux/i2c.h>
 #include <linux/platform_device.h>
+#include <linux/acpi.h>
 #include <linux/spi/spi.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -2503,6 +2504,14 @@ static const struct i2c_device_id rt5670_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, rt5670_i2c_id);
 
+#ifdef CONFIG_ACPI
+static struct acpi_device_id rt5670_acpi_match[] = {
+	{ "10EC5670", 0},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, rt5670_acpi_match);
+#endif
+
 static int rt5670_i2c_probe(struct i2c_client *i2c,
 		    const struct i2c_device_id *id)
 {
@@ -2691,6 +2700,7 @@ static struct i2c_driver rt5670_i2c_driver = {
 	.driver = {
 		.name = "rt5670",
 		.owner = THIS_MODULE,
+		.acpi_match_table = ACPI_PTR(rt5670_acpi_match),
 	},
 	.probe = rt5670_i2c_probe,
 	.remove   = rt5670_i2c_remove,