drm/amd/display: Refactor DCN4x and related code

[why & how]
Refactor existing code related to DCN4x for better code sharing with
other modules.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Sig

drm/amd/display: Refactor DCN4x and related code

[why & how]
Refactor existing code related to DCN4x for better code sharing with
other modules.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Swapnil Patel <Swapnil.Patel@amd.com>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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drm/amd/display: Fix BT2020 YCbCr limited/full range input

[Why]
BT2020 YCbCr input is not handled properly when full range
quantization is used and limited range is not supported at all.

[How]
- A

drm/amd/display: Fix BT2020 YCbCr limited/full range input

[Why]
BT2020 YCbCr input is not handled properly when full range
quantization is used and limited range is not supported at all.

[How]
- Add enums for BT2020 YCbCr limited/full range
- Add limited range CSC matrix

Reviewed-by: Krunoslav Kovac <krunoslav.kovac@amd.com>
Signed-off-by: Ilya Bakoulin <Ilya.Bakoulin@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Robert Mader <robert.mader@collabora.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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