mips: bmips: bcm6328: fix brcm, bcm6328-mc size

Shrink brcm,bcm6328-mc size to avoid overlapping with other controllers

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

arch/mips/dts/brcm,bcm6328.dtsi

@@ -120,7 +120,7 @@
 
 		memory-controller@10003000 {
 			compatible = "brcm,bcm6328-mc";
-			reg = <0x10003000 0x1000>;
+			reg = <0x10003000 0x864>;
 			u-boot,dm-pre-reloc;
 		};
 	};