ARM: dts: imx6: add mxs phy controller id

We need to use controller id to access different register regions
for mxs phy.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6qdl.dtsi

@@ -35,6 +35,8 @@
 		spi1 = &ecspi2;
 		spi2 = &ecspi3;
 		spi3 = &ecspi4;
+		usbphy0 = &usbphy1;
+		usbphy1 = &usbphy2;
 	};
 
 	intc: interrupt-controller@00a01000 {

arch/arm/boot/dts/imx6sl.dtsi

@@ -28,6 +28,8 @@
 		spi1 = &ecspi2;
 		spi2 = &ecspi3;
 		spi3 = &ecspi4;
+		usbphy0 = &usbphy1;
+		usbphy1 = &usbphy2;
 	};
 
 	cpus {