For openwrt R9.6.1
cd lede
git clone https://github.com/WingLim/k2p-openwrt-mt7615.git
mv k2p-openwrt-mt7615_5.0.2.0/mtk package/mtk
make menuconfig
MTK Properties-->Drivers-->kmod-mt_wifi
Choose First WiFi Interface-->MT7615E
MT WIFI Driver-->WiFi Operation Modes-->AP
MTK Properties-->Drivers-->wifi-l1-profile-->1st card
MTK Properties-->Misc-->mtk-luci-plugin-->luci-app-mtk-wifi
编译时遇到的错误参考了hanwckf的patch https://github.com/hanwckf/openwrt-mt7615