mx6ullevk: Add missing MAINTAINERS for mx6ull_14x14_evk_plugin_defconfig

Add 'Peng Fan' as MAINTAINERS of configs/mx6ull_14x14_evk_plugin_defconfig
which is missing in below commit
"imx: mx6ull_14x14_evk: add plugin defconfig"
(sha1: b90ebf49bb8f74afe68f696f59a0e24cc79f2031)

Cc: Stefano Babic <sbabic@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jagan Teki <jagan@openedev.com>
1 file changed