Update on CFT error reporting

[Matthew Macy]

To improve the user experience I disabled debug logging by default. Before reporting a non-fatal error  with i915 load the drm2 module first, then: sysctl dev.drm.drm_debug=-1 to enable full logging. Once you have done that you can then load i915. The "unimplemented" and "dodgy" warnings are expected, they're just placeholders to remind me to get back to them.


Thanks.
-M