Wi-Fi Doesnt work in Hikey970 running AOSP master

After a week of trials and fixes, I got the latest AOSP Master Branch ® up and running on Hikey970 board.
it has WL1837MOD Wi-Fi Module from Ti on it.
It doesn’t work while i try to enable Wi-Fi from the setting menu. (You enable, it gets disable)
i think this has something to do with removed policy (that i removed). hope its not about drivers.

Anyone managed to get on-board Wi-Fi running in Hikey970 ?

Thanks in advance.