imx: Fix warning by building vf610twr_nand

commit d6d07a9b... arm: vf610: add NAND support for vf610twr
generates the following warnings:

WARNING: no status info for 'vf610twr_nand'
WARNING: no maintainers for 'vf610twr_nand'WARNING: no status info for
'vf610twr_nand'

This is due to the fact that vf610twr_nand_defconfig has no Maintainer.
This patch proposed Alison as Maintainer and fix it.

Signed-off-by: Stefano Babic <sbabic@denx.de>
Acked-by: Alison Wang <b18965@freescale.com>
CC: Stefan Agner <stefan@agner.ch>
diff --git a/board/freescale/vf610twr/MAINTAINERS b/board/freescale/vf610twr/MAINTAINERS
index 56a09c9..f2997f0 100644
--- a/board/freescale/vf610twr/MAINTAINERS
+++ b/board/freescale/vf610twr/MAINTAINERS
@@ -4,3 +4,4 @@
 F:	board/freescale/vf610twr/
 F:	include/configs/vf610twr.h
 F:	configs/vf610twr_defconfig
+F:	configs/vf610twr_nand_defconfig