drm/amdgpu: skip invalid ip blocks in ip helpers

Skip IP blocks that are not enabled.

Reviewed-by: Chunming zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-06-23 11:53:12 -04:00
commit 9ecbe7f506