net80211: add missing 80Mhz and 160Mhz channel ranges

We have two arrays, one for 80Mhz and one for 160Mhz. Both were lacking
frequency ranges for more possibly available configurations (the other
bits of what is valid are for regdomain to set right).

Sponsored by: The FreeBSD Foundation
Fixes: 67f4aa3878efa, 04e7bb08a5750
Reviewed by: adrian
Differential Revision: https://reviews.freebsd.org/D48357

(cherry picked from commit 1832eb102e10c7f2891c032ecf7b265b75d3cd50)