drm/amd/display: Fix scratch registers offsets for DCN351

drm/amd/display: Fix scratch registers offsets for DCN351

[Why]
Different platforms use different NBIO header files,
causing display code to use differnt offset and read
wrong accelerated status.

[How]
- Unified NBIO offset header file across platform.
- Correct scratch registers offsets to proper locations.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4667
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>