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.
Use this inline function to replace os_memcmp(addr, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0.