If you look closely at your dmesg, you'll see this:
Atheros Communications product 0x002a (miscellaneous network, revision 0x01) at pci5 dev 0 function 0 not configured
That product number indicates that it uses an AR9281-based chipset, according to
ath(4) the ath9xxx family is not supported by NetBSD (..or OpenBSD, FreeBSD either).
Perhaps a BSD implementation for these chipsets will surface eventually, until then you'll have to use another wireless card.