wireless-regdb: Update regulatory rules for Brazil (BR)

The rules for Brazil in wireless-regdb have no comment indicating where
they came from, and haven't been updated in a long time. There have been
some changes to the legislation since then, including the addition of
the 6 GHz and 60 GHz ranges.

Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.eti.br>
Signed-off-by: Seth Forshee <sforshee@kernel.org>