drm/amd/display: Fold plane state check tests

[WHAT]
Reduce the four viewport KUnit tests for
amdgpu_dm_plane_helper_check_state() to one, and the three rejection
tests for amdgpu_dm_plane_atomic_check() to one.

[HOW]
Drive the viewport cases from a table of CRTC rectangles and display
sizes, and rebuild the atomic state between the helper-check, color
pipeline conflict and scaling-info sub-cases of the atomic check test.

Assisted-by: Copilot:Claude-Opus-5
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

0 files changed, 0 insertions, 0 deletions