ARM: dts: r8a7791: Add Inter Connect RAM

R-Car M2-W has 2 regions of Inter Connect RAM (72 + 4 KiB).
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7791.dtsi

@@ -890,6 +890,16 @@ hscif2: serial@e62d0000 {
 		status = "disabled";
 	};
 
+	icram0:	sram@e63a0000 {
+		compatible = "mmio-sram";
+		reg = <0 0xe63a0000 0 0x12000>;
+	};
+
+	icram1:	sram@e63c0000 {
+		compatible = "mmio-sram";
+		reg = <0 0xe63c0000 0 0x1000>;
+	};
+
 	ether: ethernet@ee700000 {
 		compatible = "renesas,ether-r8a7791";
 		reg = <0 0xee700000 0 0x400>;