ARM: dts: sun7i: Remove skeleton and memory to avoid warnings

Using skeleton.dtsi will create a memory node that will generate a warning
in DTC. However, that node will be created by the bootloader, so we can
just remove it entirely in order to remove that warning.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun7i-a20.dtsi

@@ -42,8 +42,6 @@
  *     OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include "skeleton.dtsi"
-
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/thermal/thermal.h>
 #include <dt-bindings/dma/sun4i-a10.h>
@@ -52,6 +50,8 @@
 
 / {
 	interrupt-parent = <&gic>;
+	#address-cells = <1>;
+	#size-cells = <1>;
 
 	aliases {
 		ethernet0 = &gmac;
@@ -171,10 +171,6 @@ cpu_crit: cpu_crit {
 		};
 	};
 
-	memory {
-		reg = <0x40000000 0x80000000>;
-	};
-
 	reserved-memory {
 		#address-cells = <1>;
 		#size-cells = <1>;