The helper function is used to submit mes command and poll waiting
for the command completion.

v2: replaced with amdgpu_fence_wait_polling to wait.
Signed-off-by: NJack Xiao <Jack.Xiao@amd.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>