ARM: sunxi: DT: Convert to device tree includes

Prepare the device trees to use the C preprocessor.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index 9f67508..8c05070 100644
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -47,7 +47,7 @@
  *     OTHER DEALINGS IN THE SOFTWARE.
  */
 
-/include/ "skeleton.dtsi"
+#include "skeleton.dtsi"
 
 / {
 	interrupt-parent = <&gic>;