wifi: iwlwifi: mvm: Remove outdated comment

wifi: iwlwifi: mvm: Remove outdated comment

This comment was added when iwl_mvm_alloc_sta_after_restart configured
the FW with an internal station, but then it was changed by
164a52d45e4a ("wifi: iwlwifi: mvm: send full STA during HW restart")
to configure the full sta, So there is no reason to "wait for mac80211 to
add the STA" as this is exacly where it happens.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Link: https://msgid.link/20240320232419.d656c2385b06.Icccd0640eb9f1ad72ff74792086435dfc0bee6eb@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>