ARM: dts: dra7x-evm: Enable dual-role mode for USB1

USB1 port is micro-AB type and can function as peripheral
as well as host. Enable dual-role mode for USB1.

We don't want to use the OTG controller block on this
platform as it limits host mode to high-speed. Instead
we rely on extcon framework to give us ID events for
dual-role mode detection.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7-evm.dts

@@ -527,7 +527,8 @@ &omap_dwc3_2 {
 };
 
 &usb1 {
-	dr_mode = "peripheral";
+	dr_mode = "otg";
+	extcon = <&extcon_usb1>;
 };
 
 &usb2 {

arch/arm/boot/dts/dra72-evm-common.dtsi

@@ -392,7 +392,8 @@ &omap_dwc3_2 {
 };
 
 &usb1 {
-	dr_mode = "peripheral";
+	dr_mode = "otg";
+	extcon = <&extcon_usb1>;
 };
 
 &usb2 {