Which driver module use your wifi card, Raspberry Pi

List all USB modules

lsusb

Now can view detailed information with

lsusb -s 001:004 -v

The output will be similar like

There are a lot of stuff but after all, you can not really tell the module name.

Lets list all loaded modules and based of founded Wireless name try to guess yours

lsmod

Another way is power down the pi and turn it on without the wifi dongle and run lsmod again. See the difference!

List module info

modinfo rt2800usb

Output:

Here is brilliant list which module can work as an access point:
https://wireless.wiki.kernel.org/en/users/Drivers

Related:
https://www.cyberciti.biz/faq/linux-find-wireless-driver-chipset/