SDMA queue allocation requires the dqm lock as it modify
the global dqm members. Enclose it in the dqm_lock.
Signed-off-by: NOak Zeng <Oak.Zeng@amd.com>
Reviewed-by: NPhilip Yang <philip.yang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>