ARM: shmobile: r8a7778 dtsi: Use generic names for device nodes

irqpin -> interrupt-controller

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7778.dtsi

@@ -68,7 +68,7 @@
 	};
 
 	/* irqpin: IRQ0 - IRQ3 */
-	irqpin: irqpin@fe78001c {
+	irqpin: interrupt-controller@fe78001c {
 		compatible = "renesas,intc-irqpin-r8a7778", "renesas,intc-irqpin";
 		#interrupt-cells = <2>;
 		interrupt-controller;