ERROR: "ieee80211_hdrlen" [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined!

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   574823bfab82d9d8fa47f422778043fbb4b4f50e
commit: aca432f06b8a60a92b27fb46e6518a19b28ca93f iwlwifi: make MVM and DVM depend on MAC80211
date:   3 weeks ago
config: x86_64-randconfig-i1-01061720 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout aca432f06b8a60a92b27fb46e6518a19b28ca93f
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

>> ERROR: "ieee80211_hdrlen" [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined!
>> ERROR: "ieee80211_channel_to_frequency" [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined!
>> ERROR: "reg_query_regdb_wmm" [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined!

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