wifi: mac80211: Check for missing VHT elements only for 5 GHz

Check for missing VHT Capabilities and VHT Operation elements in
association response frame only for 5 GHz links.

Fixes: 310c8387 ("wifi: mac80211: clean up connection process")
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20240827103920.dd711282d543.Iaba245cebc52209b0499d5bab7d8a8ef1df9dd65@changeid


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