A pm4 header for Navi. PM4 is the packet format used
by the compute and gfx engines.
Signed-off-by: NHuang Rui <ray.huang@amd.com>
Signed-off-by: NHawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>