Need a dummy tc_fb_cnattach() until we have real fb support on TURBOchannel machines.
Need a dummy tc_fb_cnattach() until we have real fb support on
TURBOchannel machines.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars