fwget: add support for various WiFi NICs

Add support for Realtek, QCA, and Mediatek WiFi NIC cards.
We group the matching entries by driver in sub-functions in order
to semi-automatically create the lists for now.

Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D40073

fwget: Introduce new utility

This script's goal is to check the system for peripherals that needs
firmware and install the needed packages for them.
For now it only support pci subsystem and only video classes for AMD
and Intel GPUs.

Reviewed by: bapt
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D39825