drm/amd/display: Support OLED SDR with AMD ABC

[Why]
Nits programming for SDR panel is only supported by VESA ABC.

[How]
1. Loose nits programming for OLED SDR panel with AMD ABC.
2. We support two ABC methods. Disable one before we program the other
   in case panel freaks out.
3. Update HDR judgement in setBR with a solider condition.

Reviewed-by: Krunoslav Kovac <krunoslav.kovac@amd.com>
Signed-off-by: Camille Cho <Camille.Cho@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>