drm/amd/display: Fix blend LUT programming

[Why]
LUT write index does not get reset to zero when writing the LUT values
for each separate RGB component, which results in wrong data for 2 of
the 3 components.

[How]
Reset LUT write index to zero before writing each component's data.

Reviewed-by: Krunoslav Kovac <[email protected]>
Acked-by: Hersen Wu <[email protected]>
Signed-off-by: Ilya Bakoulin <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

0 files changed, 0 insertions, 0 deletions