ARM: dts: renesas: r8a7792: Add LBSC node

Add a minimal device node for the Local Bus State Controller (LBSC) on
the R-Car V2H SoC, to be extended by board DTS files for devices
residing in the LBSC external address space.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/182fce2257679f6a8963ecb77aae68af617556d1.1693481518.git.geert+renesas@glider.be

arch/arm/boot/dts/renesas/r8a7792.dtsi

@@ -84,6 +84,13 @@ extal_clk: extal {
 		clock-frequency = <0>;
 	};
 
+	lbsc: lbsc {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0 0 0x1c000000>;
+	};
+
 	pmu {
 		compatible = "arm,cortex-a15-pmu";
 		interrupts-extended = <&gic GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>,