drm/amd/amdgpu: Add DPHY_SCRAM_CNTL register defines

This is required for DP HBR2 test pattern

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: add DCE 10.0 register headers

These are register headers for the DCE (Display and Composition Engine)
block on the GPU.

Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Jammy Zhou <Jammy.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>