ARM: dts: omap4-sdp: No need to disable mcbsp3 node

All audio nodes has been set to disabled state in omap4.dtsi file.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap4-sdp.dts

@@ -548,10 +548,6 @@ &mcbsp2 {
 	status = "okay";
 };
 
-&mcbsp3 {
-	status = "disabled";
-};
-
 &dmic {
 	pinctrl-names = "default";
 	pinctrl-0 = <&dmic_pins>;