arm64: tegra: Add reset-cells to memory controller

Tegra210 device tree is missing reset-cells property for the memory
controller node. This patch adds it.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra210.dtsi

@@ -894,6 +894,7 @@ mc: memory-controller@70019000 {
 		interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
 
 		#iommu-cells = <1>;
+		#reset-cells = <1>;
 	};
 
 	emc: external-memory-controller@7001b000 {