Revert unneeded changes of r190919

[Ed Schouten]

Hi all,

Because the changes in r190919 did contain some nice fixes, but some of
them were unneeded or should not attempted to be fixed here, I've
decided to prepare a commit to revert the changes made in r190919,
except the improvements Christoph made to the inline assembly.

	http://80386.nl/pub/cmallon.diff

After this patch is applied, only the following things have changed:

- The inline functions in cpufunc.h will use the N modified to figure
  out how to call the instruction.
- The code in machdep.c will call _inb()/_outb() instead of rolling its
  own version.

This fixes the issue John is seeing.

I'm currently busy testing the patch. Any comments?

-- 
 Ed Schouten <ed at 80386.nl>
 WWW: http://80386.nl/
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