Comment 1 for bug 1040405

This patch adds the support for the omap X11 driver autoload following the same solution we have for other a ARM boards (which we also used for our previous cycle).

At the end there's a small change as well to make xorg to use the recently added platform probe functions, by trying to probe the driver in case there's only one platform device available and without a valid busID (case of Omap3 and Omap4 based devices). This will allow the platformProbe to be used by the omap X11 driver, fixing the behavior of loading more than one screen by default (one for omap and another for fbdev).

To make the upstream code to work with the platform bus support by default, we'd still need some other changes to land, and a solution which we could find one single ID that could be used by all platform devices, so this workaround should be enough at least for Quantal.