wifi: mac80211: simplify adding supported rates

Make this a new-style "put" function, and change the
parameters to pass more information directly, this
makes it usable also for the MLME code.

Link: https://msgid.link/20240129202041.f604a03bd728.I8c798ea45b8479ac9982e77d0378af11a09ccdaf@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>