[LinuxBIOS] adding "--list-supported" feature to superiotool #91

[Robinson Tryon]

Here's a first shot at bug #91
(http://tracker.linuxbios.org/trac/LinuxBIOS/ticket/91), adding a
--list-supported switch to superiotool.

I wasn't very sure about what the "wiki links" part of this feature
entailed.  I included the primary url for superiotool, but perhaps
there's something more that needs to be done?

In terms of formatting, I just grouped the chips by vendor.  For chips
that have dump support I added "(dump)" after their name.

Signed-off-by: Robinson P. Tryon

Oh, and how should I go about getting an account on Trac?  I'd be
happy to take a stab at adding --list-supported to flashrom (#90) once
this patch passes muster.

--R