drm fixes for 5.6-rc3

core:
- Allow only 1 rotation argument, and allow 0 rotation in video cmdline.

i915:
- Workaround missing Display Stream Compression (DSC) state readout by
 forcing modeset when its enabled at probe
- Fix EHL port clock voltage level requirements
- Fix queuing retire workers on the virtual engine
- Fix use of partially initialized waiters
- Stop using drm_pci_alloc/drm_pci/free
- Fix rewind of RING_TAIL by forcing a context reload
- Fix locking on resetting ring->head
- Propagate our bug filing URL change to stable kernels

panfrost:
- Small compiler warning fix for panfrost.
- Fix when using performance counters in panfrost when using per fd address space.

sun4xi:
- Fix dt binding

nouveau:
- tu11x modesetting fix
- ACR/GR firmware support for tu11x (fw is public now)

msm:
- fix UBWC on GPU and display side for sc7180
- fix DSI suspend/resume issue encountered on sc7180
- fix some breakage on so called "linux-android" devices
  (fallout from sc7180/a618 support, not seen earlier
  due to bootloader/firmware differences)
- couple other misc fixes

amdgpu:
- HDCP fixes
- xclk fix for raven
- GFXOFF fixes
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