Remove the GPL notification text from the files that were initially contributed by myself. Signed-hostap: Jouni Malinen <j@w1.fi>
IEEE 802.11w/D6.0 defines new AKMPs to indicate SHA256-based algorithms for key derivation (and AES-CMAC for EAPOL-Key MIC). Add support for using new AKMPs and clean up AKMP processing with helper functions in defs.h.