imx: ventana: add new board configs to MAINTAINERS

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/board/gateworks/gw_ventana/MAINTAINERS b/board/gateworks/gw_ventana/MAINTAINERS
index b44fb4d..265ddac 100644
--- a/board/gateworks/gw_ventana/MAINTAINERS
+++ b/board/gateworks/gw_ventana/MAINTAINERS
@@ -3,4 +3,6 @@
 S:	Maintained
 F:	board/gateworks/gw_ventana/
 F:	include/configs/gw_ventana.h
-F:	configs/gwventana_defconfig
+F:	configs/gwventana_nand_defconfig
+F:	configs/gwventana_emmc_defconfig
+F:	configs/gwventana_gw5904_defconfig