board: toradex: change maintainer to Francesco

Marcel is leaving Toradex and the email will start bouncing in a few
weeks, move maintainership to myself.

Cc: Marcel Ziswiler <marcel@ziswiler.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
diff --git a/board/toradex/colibri_imx7/MAINTAINERS b/board/toradex/colibri_imx7/MAINTAINERS
index e4583d5..80770cc 100644
--- a/board/toradex/colibri_imx7/MAINTAINERS
+++ b/board/toradex/colibri_imx7/MAINTAINERS
@@ -1,5 +1,5 @@
 Colibri iMX7
-M:	Marcel Ziswiler <marcel.ziswiler@toradex.com>
+M:	Francesco Dolcini <francesco.dolcini@toradex.com>
 W:	http://developer.toradex.com/software/linux/linux-software
 W:	https://www.toradex.com/community
 S:	Maintained