LinuxKPI: 802.11: prepare for iwlwifi driver updates

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.

Unconditionally enable the other changes for newer drivers, as needed by
iwlwifi (and others).

Sponsored by: The FreeBSD Foundation
Approved by: re (gjb)

(cherry picked from commit 815b7436a7c6302365b6514194d27d41cb736227)
(cherry picked from commit 3e1f5cc9a81a6065ddc371eea5755b4e207d72f8)
(cherry picked from commit 82782cffead3c757a94a10fe02b202a4dd3b1a04)