ARM: dts: imx: Remove skeleton.dtsi

As explained by commit 9c0da3cc61 ("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: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx31.dtsi

@@ -9,9 +9,10 @@
  * http://www.gnu.org/copyleft/gpl.html
  */
 
-#include "skeleton.dtsi"
-
 / {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
 	aliases {
 		serial0 = &uart1;
 		serial1 = &uart2;