drm/amdgpu: allocate ip_block_enabled memory in common code

Remove duplication across asic families and make it symmetric
with the freeing of the code in amdgpu_device.c

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

diff --cc drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
Simple merge

diff --cc drivers/gpu/drm/amd/amdgpu/cik.c
Simple merge

diff --cc drivers/gpu/drm/amd/amdgpu/vi.c
Simple merge