randconfig build error with next-20140306, in drivers/net/wireless/airo.c

Building with attached random configuration file,

 LD      init/built-in.o
drivers/built-in.o: In function `airo_get_range':
airo.c:(.text+0x427699): undefined reference to `ieee80211_channel_to_frequency'
drivers/built-in.o: In function `airo_get_freq':
airo.c:(.text+0x428643): undefined reference to `ieee80211_channel_to_frequency'
drivers/built-in.o: In function `airo_set_freq':
airo.c:(.text+0x428696): undefined reference to `ieee80211_frequency_to_channel'
drivers/built-in.o: In function `airo_get_scan':
airo.c:(.text+0x4294f5): undefined reference to `ieee80211_channel_to_frequency'
make: *** [vmlinux] Error 1