drm/amdgpu/discovery: add psp13 support for PSP 13.0.7

Enable psp 13 support.

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