ARM: dts: renesas: r8a7792: Add missing unit address to bus node

Add missing unit address to bus node to fix the following DTC W=1
warning:

    arch/arm/boot/dts/renesas/r8a7792.dtsi:89.12-94.4: Warning (unit_address_vs_reg): /bus: node has a reg or ranges property, but no unit name

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260327234244.91707-4-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: Marek Vasut

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

@@ -86,7 +86,7 @@
 		bootph-all;
 	};
 
-	lbsc: bus {
+	lbsc: bus@0 {
 		compatible = "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;