arm64: tegra: Set usb micro-b port to otg mode on P3450

The usb micro-b port on p3450 is capable of otg and doesn't need
hardcoded to peripheral. No other supported tegra device is set up like
this, so align for consistency.

Signed-off-by: Aaron Kling <webgeek1234@gmail.com>

arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts

@@ -530,7 +530,7 @@
 		ports {
 			usb2-0 {
 				status = "okay";
-				mode = "peripheral";
+				mode = "otg";
 				usb-role-switch;
 
 				vbus-supply = <&vdd_5v0_usb>;