drm/amd/display: remove unneeded defines from bios parser

Removes DEFINEs that should have been removed after they were
introduced to ObjectID.h by the commit abea57d7
("drm/amdgpu: Add BRACKET_LAYOUT_ENUMs to ObjectID.h")

Signed-off-by: Tales Aparecida <tales.aparecida@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>