device-fsl

MA-11895-1 [Android] support merge two defconfig when generate .config

generate .config through kernel/scripts/kconfig/merge_config.sh
merge_config.sh can merger multible configures.

Change-Id: Iddaaf29f7553efe84410989d7acd64a32bb93e79
Signed-off-by: Jindong <jindong.yue@nxp.com>
Reviewed-on: http://androidsource.ap.freescale.net/project/5128
Reviewed-by: zhang sanshan <sanshan.zhang@nxp.com>