imx6: wandboard: add device tree

Add device trees from Linux in preparation for driver model
conversions.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/board/wandboard/MAINTAINERS b/board/wandboard/MAINTAINERS
index d7cbae8..00a31a93 100644
--- a/board/wandboard/MAINTAINERS
+++ b/board/wandboard/MAINTAINERS
@@ -1,6 +1,9 @@
 WANDBOARD BOARD
 M:	Fabio Estevam <fabio.estevam@nxp.com>
 S:	Maintained
+F:	arch/arm/dts/imx6qdl-wandboard.dtsi
+F:	arch/arm/dts/imx6qdl-wandboard-revb1.dtsi
+F:	arch/arm/dts/imx6dl-wandboard-revb1.dts
 F:	board/wandboard/
 F:	include/configs/wandboard.h
 F:	configs/wandboard_defconfig