ARM: dts: am335x-igep0033: use phandles for USB and DMA refs

Use phandles instead of unit adresses to reference usb and dma nodes.
This makes the DT more robust and readable.
Signed-off-by: Guido Martínez <guido@vanguardiasur.com.ar>
Cc: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-igep0033.dtsi

@@ -200,31 +200,31 @@ &uart0 {
 
 &usb {
 	status = "okay";
+};
 
-	control@44e10620 {
+&usb_ctrl_mod {
 	status = "okay";
-	};
+};
 
-	usb-phy@47401300 {
+&usb0_phy {
 	status = "okay";
-	};
+};
 
-	usb-phy@47401b00 {
+&usb1_phy {
 	status = "okay";
-	};
+};
 
-	usb@47401000 {
+&usb0 {
 	status = "okay";
-	};
+};
 
-	usb@47401800 {
+&usb1 {
 	status = "okay";
 	dr_mode = "host";
-	};
+};
 
-	dma-controller@47402000  {
+&cppi41dma  {
 	status = "okay";
-	};
 };
 
 #include "tps65910.dtsi"