drm/amdgpu: add smuio v13_0_6 support

add smuio v13_0_6 callbacks to support read
rom image

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>