drm/amd/display: Add atomic transfer-function tests

[WHY]
The atomic regamma, shaper, and blend helpers were only exercised on
their linear bypass paths, leaving the generated transfer-function
cases untested.

[HOW]
Add sRGB success-path tests that verify the generated transfer
functions and the corresponding plane color-management enable flags.

Assisted-by: Copilot:GPT-5.6-Sol
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@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