DC needs to include the soc bounding box when initializing HW resources.

Including amdgpu_ucode.h directly will cause warnings, since amdgpu.h is
required to define amdgpu_device. The solution here is to split the
bounding box structs into a different header, then include it in both
amdgpu_ucode.h, and relevant DC HW resource files.
Signed-off-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>