ARM: dts: r8a7778: Remove skeleton.dtsi inclusion

As of commit 9c0da3cc ("ARM: dts: explicitly mark skeleton.dtsi
as deprecated"), including skeleton.dtsi is deprecated.

This fixes the following warning with W=1:

    Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: NMark Rutland <mark.rutland@arm.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7778.dtsi

@@ -14,8 +14,6 @@
  * kind, whether express or implied.
  */
 
-/include/ "skeleton.dtsi"
-
 #include <dt-bindings/clock/r8a7778-clock.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/interrupt-controller/irq.h>
@@ -23,6 +21,8 @@
 / {
 	compatible = "renesas,r8a7778";
 	interrupt-parent = <&gic>;
+	#address-cells = <1>;
+	#size-cells = <1>;
 
 	cpus {
 		#address-cells = <1>;