ASoC: nau8810: add I2C device and compatible ID

The nau8810 driver can also compatible with nau8812 and nau8814.
Signed-off-by: Seven Lee <wtli@nuvoton.com>
Link: https://lore.kernel.org/r/20200528070510.29959-1-wtli@nuvoton.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/nau8810.txt

-NAU8810 audio CODEC
+NAU8810/NAU8812/NAU8814 audio CODEC
 
 This device supports I2C only.
 
 Required properties:
 
-  - compatible : "nuvoton,nau8810"
+  - compatible : One of "nuvoton,nau8810" or "nuvoton,nau8812" or
+	"nuvoton,nau8814"
 
   - reg : the I2C address of the device.
 

sound/soc/codecs/nau8810.c

@@ -895,6 +895,8 @@ static int nau8810_i2c_probe(struct i2c_client *i2c,
 
 static const struct i2c_device_id nau8810_i2c_id[] = {
 	{ "nau8810", 0 },
+	{ "nau8812", 0 },
+	{ "nau8814", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, nau8810_i2c_id);
@@ -902,6 +904,8 @@ MODULE_DEVICE_TABLE(i2c, nau8810_i2c_id);
 #ifdef CONFIG_OF
 static const struct of_device_id nau8810_of_match[] = {
 	{ .compatible = "nuvoton,nau8810", },
+	{ .compatible = "nuvoton,nau8812", },
+	{ .compatible = "nuvoton,nau8814", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, nau8810_of_match);