i.MX6: engicam: Include dts files under MAINTAINERS

dts files related to i.MX6 engicam boards are maintined
under board, so include them under board/engicam/*/MAINTAINERS

Cc: Stefano Babic <sbabic@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/board/engicam/icorem6/MAINTAINERS b/board/engicam/icorem6/MAINTAINERS
index 0ef3a2c..6116648 100644
--- a/board/engicam/icorem6/MAINTAINERS
+++ b/board/engicam/icorem6/MAINTAINERS
@@ -7,3 +7,6 @@
 F:	configs/imx6q_icore_nand_defconfig
 F:	configs/imx6dl_icore_mmc_defconfig
 F:	configs/imx6dl_icore_nand_defconfig
+F:	arch/arm/dts/imx6qdl-icore.dtsi
+F:	arch/arm/dts/imx6q-icore.dts
+F:	arch/arm/dts/imx6dl-icore.dts