ARM: dts: tegra20: Add clock entry to External Memory Controller

Add clock entry into the EMC DT node.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra20.dtsi

@@ -633,6 +633,7 @@ memory-controller@7000f400 {
 		compatible = "nvidia,tegra20-emc";
 		reg = <0x7000f400 0x200>;
 		interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&tegra_car TEGRA20_CLK_EMC>;
 		#address-cells = <1>;
 		#size-cells = <0>;
 	};