[LinuxBIOS] [PATCH] Fix ITE IT8705F support

[Corey Osgood]

I'm still not entirely convinced that the previous version was flawed,
but this one has more features, and covers some of what Uwe had marked
as TODO anyways, with more that I'll fix up later.

This is a port from SMSC LPC47M10x's _early_serial.c to the ITE IT8705f
that works with my configuration. I've also ported the superio.c, since
it has more features than the current one, and it came out in the end
looking almost identical to Uwe's for the features they share. If anyone
has the hardware, please test and let me know if it does or doesn't work
for you (or if the old one did), I haven't booted a payload with it yet
to test it fully.

Signed-off-by: Corey Osgood