drm/amdgpu: add gc v11_0_3 ip headers

Add gc v11_0_3 register offset and shift masks
header files

v2: update registers (Alex)

Signed-off-by: Frank Min <Frank.Min@amd.com>
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>