ARM: dts: k2g-evm: Add unit address to memory node

With the new Keystone 2 Industrial Communication EVM adding the
unit address to the memory node it made sense to add it for this board
also.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>

arch/arm/boot/dts/keystone-k2g-evm.dts

@@ -20,7 +20,7 @@ / {
 	compatible =  "ti,k2g-evm", "ti,k2g", "ti,keystone";
 	model = "Texas Instruments K2G General Purpose EVM";
 
-	memory {
+	memory@800000000 {
 		device_type = "memory";
 		reg = <0x00000008 0x00000000 0x00000000 0x80000000>;
 	};