For convenience this also adds a small beaglev_defconfig and the
firmware needed for the brcmfmac driver along with the signed regulatory
database.

The firmware is from the linux-firmware repo and the regulatory database
from the wireless-regdb Fedora package.

Signed-off-by: Emil Renner Berthing <[email protected]>
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Drew Fustini <[email protected]>