drm/amdgpu/mes11: fix to unmap legacy queue

MES fw updated to support unmapping legacy gfx/compute queue.

Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>