LinuxKPI: 802.11: add support for GCMP hw crypto offload

For iwlwifi, rtw88, and rtw89 we can treat GCMP the same way as we
treat CCMP which allows us to re-use the CCMP code for now.
Add the missing case statements and factor out some common code.

Allow IEEE80211_CRYPTO_AES_GCM_128 through our filter of supported
cipher suites to announce it to net80211.

Sponsored by; The FreeBSD Foundation
MFC after: 3 days