drm/amdgpu: sync ring type and drm hw_ip type

Use AMDGPU_HW_IP_* to set amdgpu_ring_type enum values

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