iwlwifi/LinuxKPI: 802.11: update ieee80211_request_smps()

Update ieee80211_request_smps() to the new number of arguments in
LinuxKPI (which was already prepared) and update the one call in the
older iwlwifi driver version.
This will allow iwlwifi as-is now and rtw88 to compile in case someone
else wants to work on the latter in parallel to predominant efforts on
the former.

Sponsored by: The FreeBSD Foundation
MFC after: 20 days