Build GPL sources for WAX206 or RT1800

the GPL codes seem complete since this builds without errors except for the driver

1 - I built both firmware without worry if I do not validate the mt_wifi driver everything is fine

2 - if I do validate the mt_wifi driver, error is mt_wifi.ko not found

with make package/...mt_wifi/compile I have the same error

I'm trying in wasted time for a week to find a solution and nothing works.

I have the existing mt_wifi.ko driver in the device firmware and add them manually but it would be better if I could build with the driver

does anyone have an idea ?

I answer myself:

I got the mt_wifi.ko in RT1800 bin firmware
I copied it to build_dir/target-mipsel_24kc_musl-1.1.16/linux-ramips_mt7621/mt_wifi/mt_wifi_ap/ directory
and it works
but how to build without doing this ?

Makefile or Kconfig