ARM: dts: rockchip: Add SRAM node for RK3128

RK3128 SoCs have 8KB of SRAM.
Add the respective device tree node for it.

Signed-off-by: Alex Bee <knaerzche@gmail.com>
Link: https://lore.kernel.org/r/20230829214004.314932-4-knaerzche@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: knaerzche

arch/arm/boot/dts/rockchip/rk3128.dtsi

@@ -76,6 +76,14 @@
 		#clock-cells = <0>;
 	};
 
+	imem: sram@10080000 {
+		compatible = "mmio-sram";
+		reg = <0x10080000 0x2000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0x10080000 0x2000>;
+	};
+
 	pmu: syscon@100a0000 {
 		compatible = "rockchip,rk3128-pmu", "syscon", "simple-mfd";
 		reg = <0x100a0000 0x1000>;