drm/amd/display: Remove dpia debug bits

[WHY]
Remove some unused dpia debug bits.

[HOW]
Remove them from dpia_debug_options.

Reviewed-by: Cruise Hung <cruise.hung@amd.com>
Reviewed-by: Robin Chen <robin.chen@amd.com>
Signed-off-by: Peichen Huang <PeiChen.Huang@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>