ARM: dts: am335x-wega: Set USB0 mode to otg

Set USB0 to otg mode (default) and not fix to peripheral.
As it can be used in host mode also.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-wega.dtsi

@@ -206,7 +206,6 @@ &usb {
 };
 
 &usb0 {
-	dr_mode = "peripheral";
 	status = "okay";
 };