drm: sun4i: de33: mixer: add Display Engine 3.3 (DE33) support

drm: sun4i: de33: mixer: add Display Engine 3.3 (DE33) support

The DE33 is a newer version of the Allwinner Display Engine IP block,
found in the H616, H618, H700 and T507 SoCs. DE2 and DE3 are already
supported by the mainline driver.

Notable features (from the H616 datasheet and implemented):
- 4096 x 2048 (4K) output support

Other features (implemented but not in this patchset):
- AFBC ARM Frame Buffer Compression support
- YUV pipeline support

The DE2 and DE3 engines have a blender register range within the
mixer engine register map, whereas the DE33 separates this out into
a separate display group, and adds a top register map.

The DE33 also appears to remove the global double buffer control
register, present in the DE2 and DE3.

Extend the mixer to support the DE33.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20250528092431.28825-7-ryan@testtoast.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>