brcm63xx: fix bcm6348 ext irqc compatible name

This was a remnant of an old version.

Reported-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 45583

target/linux/brcm63xx/dts/bcm6348.dtsi

@@ -58,7 +58,7 @@
 		};
 
 		ext_intc: interrupt-controller@fffe0014 {
-			compatible = "brcm,bcm6348-ext-intc";
+			compatible = "brcm,bcm6345-ext-intc";
 			reg = <0xfffe0014 0x4>;
 
 			interrupt-controller;