[ltp] radeon thinkpads LCD plus DVI port

[Alex Deucher]

I know several of you out there have radeon-based thinkpads and have
wanted to use the DVI port on the docking station in conjunction with
the built in panel.  I finally got one of the said setups and and with
the ati driver from git head LVDS plus internal TMDS now work properly
together.  I haven't worked out how to autodetect this yet, so for
now, you'll have to specify:
Option "monitorlayout" "LVDS, TMDS"
in the device section of your config.

Enjoy...

Alex