drm/amdgpu: load pmfw prior to other non-psp fw for aldebaran

PMFW should be loaded before any operation that
may toggling DF-Cstate. otherwsie, tOS has no
choice but to locally toggle DF Cstate (i.e.
disable DF-Cstate even it already enabled by VBIOS)

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Le Ma <Le.Ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>