arm64: tegra: Use standard names for SRAM nodes

SRAM nodes should be named sram@<unit-address> to match the bindings.

While at it, also remove the unneeded, custom compatible string for
SRAM partition nodes.
Signed-off-by: Thierry Reding <treding@nvidia.com>

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

@@ -1262,22 +1262,20 @@ gpu@17000000 {
 		interconnect-names = "dma-mem", "write-0", "read-1", "write-1";
 	};
 
-	sysram@30000000 {
+	sram@30000000 {
 		compatible = "nvidia,tegra186-sysram", "mmio-sram";
 		reg = <0x0 0x30000000 0x0 0x50000>;
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x0 0x0 0x30000000 0x50000>;
 
-		cpu_bpmp_tx: shmem@4e000 {
-			compatible = "nvidia,tegra186-bpmp-shmem";
+		cpu_bpmp_tx: sram@4e000 {
 			reg = <0x4e000 0x1000>;
 			label = "cpu-bpmp-tx";
 			pool;
 		};
 
-		cpu_bpmp_rx: shmem@4f000 {
-			compatible = "nvidia,tegra186-bpmp-shmem";
+		cpu_bpmp_rx: sram@4f000 {
 			reg = <0x4f000 0x1000>;
 			label = "cpu-bpmp-rx";
 			pool;

arch/arm64/boot/dts/nvidia/tegra194.dtsi

@@ -1803,22 +1803,20 @@ pcie_ep@141a0000 {
 		nvidia,aspm-l0s-entrance-latency-us = <3>;
 	};
 
-	sysram@40000000 {
+	sram@40000000 {
 		compatible = "nvidia,tegra194-sysram", "mmio-sram";
 		reg = <0x0 0x40000000 0x0 0x50000>;
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x0 0x0 0x40000000 0x50000>;
 
-		cpu_bpmp_tx: shmem@4e000 {
-			compatible = "nvidia,tegra194-bpmp-shmem";
+		cpu_bpmp_tx: sram@4e000 {
 			reg = <0x4e000 0x1000>;
 			label = "cpu-bpmp-tx";
 			pool;
 		};
 
-		cpu_bpmp_rx: shmem@4f000 {
-			compatible = "nvidia,tegra194-bpmp-shmem";
+		cpu_bpmp_rx: sram@4f000 {
 			reg = <0x4f000 0x1000>;
 			label = "cpu-bpmp-rx";
 			pool;