[PATCH] [alpha] Remove unused code, _dense_* functions, iobase stuff

[Mark Kettenis]

> From: Matt Turner <mattst88 at gmail.com>
> Date: Sun,  1 Nov 2009 15:05:08 -0500
> 
> This code has been unused since the switch to libpciaccess. It
> really should have been killed by fba700f1f6a8976.

Uh, what makes you think so?  As far as I can tell, libpciaccess only
handles mmio.  One could argue that libpciaccess should also handle
"legacy" io, but until that is implemented, and the drivers have been
adjusted, I think at least some of this code is still necessary.