arm64: dts: s32g2: add memory nodes for evb and rdb2

Add memory nodes for S32G-VNP-EVB and S32G-VNP-RDB2.
Signed-off-by: Chester Lin <clin@suse.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/s32g274a-evb.dts

 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 /*
  * Copyright (c) 2021 SUSE LLC
+ * Copyright (c) 2019-2021 NXP
  */
 
 /dts-v1/;
@@ -18,6 +19,13 @@ aliases {
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
+
+	/* 4GiB RAM */
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0 0x80000000>,
+		      <0x8 0x80000000 0 0x80000000>;
+	};
 };
 
 /* UART (J58) to Micro USB port */

arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts

 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
 /*
  * Copyright (c) 2021 SUSE LLC
+ * Copyright (c) 2019-2021 NXP
  */
 
 /dts-v1/;
@@ -19,6 +20,13 @@ aliases {
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
+
+	/* 4GiB RAM */
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x0 0x80000000 0 0x80000000>,
+		      <0x8 0x80000000 0 0x80000000>;
+	};
 };
 
 /* UART (J2) to Micro USB port */