drm/amdgpu: fix amdgpu_ring_write_multiple

Overwriting still used ring content has a low probability to cause
problems, not writing at all has 100% probability to cause problems.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
1 file changed