arm64: tegra: Enable memory controller on P3310

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

arch/arm64/boot/dts/nvidia/tegra186-p3310.dtsi

@@ -51,6 +51,10 @@
 		};
 	};
 
+	memory-controller@2c00000 {
+		status = "okay";
+	};
+
 	serial@3100000 {
 		status = "okay";
 	};