ARM: dts: armada-375: Remove skeleton.dtsi

The skeleton.dtsi file was removed in ARM64 for different reasons as
explained in commit ("3ebee5a2 arm64: dts: kill skeleton.dtsi").

These also applies to ARM and it will also allow to get rid of the
following DTC warnings in the future:

"Node /memory has a reg or ranges property, but no unit name"
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm/boot/dts/armada-375.dtsi

@@ -45,7 +45,6 @@
  *     OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include "skeleton.dtsi"
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/phy/phy.h>
@@ -53,6 +52,9 @@
 #define MBUS_ID(target,attributes) (((target) << 24) | ((attributes) << 16))
 
 / {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
 	model = "Marvell Armada 375 family SoC";
 	compatible = "marvell,armada375";