nnet80211: regdomain: add the two other 160MHz bands

[bz]

Summary

ETSI had one 160Mhz band in regdomain but the other two were missing.
Add them. I am always confused that the bands use the center frequency
of the 20Mhz edge channels rather than the actual edges so it seems we
are only configuring 140Mhz instead of 160Mhz.

We will have to go through the entire regdomain file one
day and make sure to verify all the power levels.

Sponsored by: The FreeSBD Foundation
MFC after: 3 days

[adrian]

oh yeah, the whole setup here is very much from what the atheros HAL did, and it ... needs to be fixed/cleaned up :)