ARM/dts: omap5-evm: Disable unused McBSP3

McBSP3 is not usable on OMAP4 SDP/Blaze (the pins used for McPDM).
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap5-evm.dts

@@ -82,3 +82,7 @@ &keypad {
 			0x020700d9>;	/* SEARCH */
 	linux,input-no-autorepeat;
 };
+
+&mcbsp3 {
+	status = "disabled";
+};