wifi: iwlwifi: mvm: use the right version of the rate API

wifi: iwlwifi: mvm: use the right version of the rate API

The firmware uses the newer version of the API in recent devices. For
older devices, we translate the rate to the new format.
Don't parse the rate with old parsing macros.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250209143303.13d70cdcbb4e.Ic92193bce4013b70a823cfef250ee79c16cf7c17@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>