ARM: dts: clps711x: edb7211: Add unit-address to memory node

The memory node requires a unit-address, add it.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Link: https://lore.kernel.org/r/20210405051658.26779-4-shc_work@mail.ru'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/ep7211-edb7211.dts

@@ -7,7 +7,7 @@ / {
 	model = "Cirrus Logic EP7211 Development Board";
 	compatible = "cirrus,edb7211", "cirrus,ep7211", "cirrus,ep7209";
 
-	memory {
+	memory@c0000000 {
 		device_type = "memory";
 		reg = <0xc0000000 0x02000000>;
 	};