I heard some people where having issues aquiring the ROM for their Rockchip RK322X (RK3228a/RK3229) with the SV6158 WiFi chip. I ended up finding someone who made a multi-tool backup, and was able to have another person test it on their bricked box and it ended up fixing the WiFi. However I need to post the file, and instructions later today with a bit more information. I hope this backup will help fix you're box with broken WiFi on other ROMs.