Be sure you have the crda package installed and that your country code (regdom) is set correctly.
You may also find if you lower the channels on the 5 GHz band to 40 or below in your router settings that your adapter will now be able to detect the 5 GHz access point.
Just adding a bit more, I can't see any issue with driver. According to your device specs:
High-Speed WiFi: 256QAM support increases the 2.4 GHz
data rate from 150 Mbps to 200 Mbps. 200 Mbps on the 2.4 GHz
band and 433 Mbps on the 5 GHz band provide fast AC WiFi*.
Of course with ideal conditions 2.4GHz can go up to 450Mbps but does not seems that your device support it.
Try iwconfig on a terminal, it will give you a better clue of frequency and speed you are currently using.
At last, check your Access Point/Wifi Router, you can use iwlist <device> scanning or even an Androind application - you choose.
I'm glad that fixed things up for you @chickooiyer, however please state which of my suggestions fixed your issue (for other users benefit in the future) .
You may also find if you lower the channels on the 5 GHz band to 40 or below in your router settings that your adapter will now be able to detect the 5 GHz access point.
