ARM: dts: don't assume boards are using twl4030 for omap3

If a board isn't using twl4030, then dtc will complain about the missing
phandle (which is in twl4030.dtsi).  Move the phy declaration to the dts
files.

Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap3-beagle-xm.dts

@@ -122,6 +122,7 @@
 
 &usb_otg_hs {
 	interface-type = <0>;
+	usb-phy = <&usb2_phy>;
 	mode = <3>;
 	power = <50>;
 };