drm/amdgpu:in cntx_ctrl we need insert meta-init for CE/DE(V2)

to support SRIOV preemption.

v2:
fix emit_frame_size

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>