Put the code manipulating scatter gather mapping for the framebuffer under ifdef to be able to compile DRM on macppc.
Put the code manipulating scatter gather mapping for the framebuffer under
ifdef to be able to compile DRM on macppc.

ok kettenis@

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