drm/amdgpu: detect sriov capability for aldebaran

SRIOV pf/vf function identifier regsiter in aldebaran
is the same as the one in arcturus

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>