ARM: dts: renesas: r8a7779: Add LBSC node

Add a minimal device node for the Local Bus State Controller (LBSC) on
the R-Car H1 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/2d0a6054306b4975355e65fe012f860ec00fcf55.1693481518.git.geert+renesas@glider.be

arch/arm/boot/dts/renesas/r8a7779.dtsi

@@ -699,6 +699,13 @@ R8A7779_CLK_MMC1 R8A7779_CLK_MMC0
 		};
 	};
 
+	lbsc: lbsc {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0 0 0x1c000000>;
+	};
+
 	prr: chipid@ff000044 {
 		compatible = "renesas,prr";
 		reg = <0xff000044 4>;