ARM: tegra: nyan: Enable GPU node and related supply

This enables the GPU node for tegra124 nyan boards, which is required to
get graphics acceleration with nouveau on these devices.
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra124-nyan.dtsi

@@ -42,6 +42,12 @@ dpaux@545c0000 {
 		};
 	};
 
+	gpu@0,57000000 {
+		status = "okay";
+
+		vdd-supply = <&vdd_gpu>;
+	};
+
 	serial@70006000 {
 		/* Debug connector on the bottom of the board near SD card. */
 		status = "okay";
@@ -214,7 +220,7 @@ vddio_1v8: sd5 {
 					regulator-always-on;
 				};
 
-				sd6 {
+				vdd_gpu: sd6 {
 					regulator-name = "+VDD_GPU_AP";
 					regulator-min-microvolt = <650000>;
 					regulator-max-microvolt = <1200000>;