This article describes the detailed steps for integrating 88W8801 to i.MX6ULL-EVK and L5.4.70_2.3.0. If you are not proficient in compiling Linux BSP for I.MX platform, you can refer to this link:
https://community.nxp.com/t5/Wireless-Connectivity-Knowledge/WiFi-BT-Integretion-Linux-BSP-compilati...
For more detailed information, see attachment, please!