arm64: dts: exynos: Add extcon property for TM2 and TM2E

Since commit 9840354f ("usb: dwc3: Add dual-role support") dwc3
node requires extcon property to be initialized as OTG mode and it
supports dual-role mode operation.
Signed-off-by: Dongwoo Lee <dwoo08.lee@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi

@@ -1204,6 +1204,7 @@ &usbdrd30 {
 
 &usbdrd_dwc3 {
 	dr_mode = "otg";
+	extcon = <&muic>;
 };
 
 &usbdrd30_phy {