ASoC: wm8962: Add device tree support

Add device tree support.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Documentation/devicetree/bindings/sound/wm8962.txt

+WM8962 audio CODEC
+
+This device supports I2C only.
+
+Required properties:
+
+  - compatible : "wlf,wm8962"
+
+  - reg : the I2C address of the device.
+
+Example:
+
+codec: wm8962@1a {
+	compatible = "wlf,wm8962";
+	reg = <0x1a>;
+};

sound/soc/codecs/wm8962.c

@@ -3758,10 +3758,17 @@ static const struct i2c_device_id wm8962_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, wm8962_i2c_id);
 
+static const struct of_device_id wm8962_of_match[] = {
+	{ .compatible = "wlf,wm8962", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, wm8962_of_match);
+
 static struct i2c_driver wm8962_i2c_driver = {
 	.driver = {
 		.name = "wm8962",
 		.owner = THIS_MODULE,
+		.of_match_table = wm8962_of_match,
 		.pm = &wm8962_pm,
 	},
 	.probe =    wm8962_i2c_probe,