drm/amdgpu: implement VCE 3.0 harvesting support (v4)

For boards with bad VCE blocks, only configure the working
block.

v2: use the harvest info for pipe setup
v3: fix mask check as noted by Leo
v4: add dGPU support

Reviewed-by: Christian König <christian.koenig@amd.com> (v2)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>