drm/amdgpu/mes: use mc address for wptr in add queue packet

use mc address for wptr in add queue packet

Signed-off-by: Frank Min <Frank.Min@amd.com>
Reviewed-by: Jack Xiao <Jack.Xiao@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>