ASoC: davinci-mcasp: Change compatible property model to more accurate

Change the model omap2-mcasp-audio in compatible property to
am33xx-mcasp-audio as omap2 does not have mcasp.
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt

@@ -4,7 +4,7 @@ Required properties:
 - compatible :
 	"ti,dm646x-mcasp-audio"	: for DM646x platforms
 	"ti,da830-mcasp-audio"	: for both DA830 & DA850 platforms
-	"ti,omap2-mcasp-audio"	: for OMAP2 platforms (TI81xx, AM33xx)
+	"ti,am33xx-mcasp-audio"	: for AM33xx platforms (AM33xx, TI81xx)
 
 - reg : Should contain reg specifiers for the entries in the reg-names property.
 - reg-names : Should contain:

sound/soc/davinci/davinci-mcasp.c

@@ -1033,7 +1033,7 @@ static const struct of_device_id mcasp_dt_ids[] = {
 		.data = &da830_mcasp_pdata,
 	},
 	{
-		.compatible = "ti,omap2-mcasp-audio",
+		.compatible = "ti,am33xx-mcasp-audio",
 		.data = &omap2_mcasp_pdata,
 	},
 	{ /* sentinel */ }