arm64: tegra: norrin: Add missing panel power supply

This panel supply is always on, so this does happen to work by accident.
Make sure to properly hook up the power supply to model the dependency
correctly and so that the panel continues to operate properly even if
the supply is not always on.

Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra132-norrin.dts

@@ -1051,6 +1051,7 @@ power {
 
 	panel: panel {
 		compatible = "innolux,n116bge";
+		power-supply = <&vdd_3v3_panel>;
 		backlight = <&backlight>;
 		ddc-i2c-bus = <&dpaux>;
 	};