drm-fixes for 5.0-rc2, part 2 nouveau: one backlight, falcon register access, and a fan fix. i915: - Disable PSR for Apple panels - Broxton ERR_PTR error state fix - Kabylake VECS workaround fix - Unwind failure on pinning the gen7 ppgtt - GVT workload request allocation fix core: - Fix fb-helper to work correctly with SDL 1.2 bugs. - Fix lockdep warning in the atomic ioctl and setproperty.