Revert "drm/amd/display: Attach blend mode property for alpha planes"

This reverts commit 44139872f2.

This regresses blend mode handling.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2026-10-02 11:55:48 -04:00
commit 41505ac433