Alternative X11 drivers

[rjs%fdy2.co.uk@localhost]

We have two versions of radeon driver in the tree, which one gets built is
selected by a make variable.

I have been working on getting an older intel driver working too, I have been
building it as well as the existing one.

I think I prefer to have both built and rename the driver files so that X11
finds the one I want but it is probably best to follow the same pattern for
radeon and intel.

What do people think ?

Robert Swindells