ARM: dts: BCM5301X: Add missing memory "device_type" for Luxul XWC-2000

This property is needed since commit abe60a3 ("ARM: dts: Kill off
skeleton{64}.dtsi"). Without it booting silently hangs at:
[    0.000000] Memory policy: Data cache writealloc

Fixes: 984829e ("ARM: dts: BCM5301X: Add DT for Luxul XWC-2000")
Signed-off-by: Rafał Miłecki <[email protected]>
Signed-off-by: Florian Fainelli <[email protected]>

Author: Rafał Miłecki

arch/arm/boot/dts/bcm47094-luxul-xwc-2000.dts

@@ -17,6 +17,7 @@
 	};
 
 	memory {
+		device_type = "memory";
 		reg = <0x00000000 0x08000000
 		       0x88000000 0x18000000>;
 	};