[LinuxBIOS] [PATCH] Fix Asus p2b and bitworks ims targets

[Corey Osgood]

This patch uses auto.c from Uwe's tyan s1846 for both boards, with some
minor changes, to bring them up to par. It also should remove (but might
just clean out) the irq_tables.c from both boards, because they were
just copied from Via Epia to begin with, and weren't usable. As far as I
can tell, these are the only changes needed to the targets for now,
aside from fixups to reset.c when the time comes. Both have been build
tested, but not checked on hardware since I don't have it. I have left
Uwe as the copyright holder since the only changes I've made are trivial.

Signed-off-by: Corey Osgood