wifi: mac80211: mlme: simplify adding ht/vht/he/eht elements

The functions currently take a link and check data
from it, but this needs to change for MLO. Simplify
the prototypes by passing only the needed arguments.

Remove the regulatory checks, the warnings shouldn't
trigger, and haven't as far as I know.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>