ASUS RT-AC88U Broadcom BCM4366 Wireless Adapter Driver Not Found

I recently updated my RT-AC88U from Asus. And after the upgrade the wireless was not working. The LED was off. Even I toggle the WIFI switch is not functional at all. Upon telneting to the device. I saw an error wl driver adapter not found. I tried every firmware that ASUS has on the support downloads but still my wireless is not working.

During my research I came across an article that it's using a Broadcom BCM4366. Does anyone here know how to install this driver? Anyone has a similar...

ASUS RT-AC88U Broadcom BCM4366 Wireless Adapter Driver Not Found