ARM: tegra: Use standard names for SRAM nodes

SRAM nodes should be named sram@<unit-address> to match the bindings.
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra20.dtsi

@@ -17,14 +17,14 @@ memory@0 {
 		reg = <0 0>;
 	};
 
-	iram@40000000 {
+	sram@40000000 {
 		compatible = "mmio-sram";
 		reg = <0x40000000 0x40000>;
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0 0x40000000 0x40000>;
 
-		vde_pool: vde@400 {
+		vde_pool: sram@400 {
 			reg = <0x400 0x3fc00>;
 			pool;
 		};

arch/arm/boot/dts/tegra30.dtsi

@@ -97,14 +97,14 @@ pci@3,0 {
 		};
 	};
 
-	iram@40000000 {
+	sram@40000000 {
 		compatible = "mmio-sram";
 		reg = <0x40000000 0x40000>;
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0 0x40000000 0x40000>;
 
-		vde_pool: vde@400 {
+		vde_pool: sram@400 {
 			reg = <0x400 0x3fc00>;
 			pool;
 		};