drm/amd/display: Fold plane modifier list tests

[WHAT]
Reduce the six KUnit tests for amdgpu_dm_plane_get_plane_modifiers() to
three, keeping every family dispatch covered.

[HOW]
Merge the GFX10.1, GFX10.3 and GFX12 cases into one table-driven test
over the family and GC IP version, and merge the two RV cases into a
table over the external revision id that selects the constant-encode
modifier variants.

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