drm/amd/display: Disable seamless boot on 128b/132b encoding
[why]
preOS will not support display mode programming and link training
for UHBR rates.
[how]
If we detect a sink that's UHBR capable, disable seamless boot
Reviewed-by: Anthony Koo <anthony.koo@amd.com> Acked-by: Wayne Lin <wayne.lin@amd.com> Signed-off-by: Sung Joon Kim <sungjoon.kim@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>