drm/amdgpu: Ta fw needs to be loaded for SRIOV aldebaran

Load ta fw during psp_init_sriov_microcode to enable XGMI.
It is required to be loaded by both guest and host starting
from Arcturus. Cap fw needs to be loaded first.

Signed-off-by: David Yu <David.Yu@amd.com>
Reviewed-by: Shaoyun.liu <Shaoyun.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>