MxGPU: Run mxgpu_vf_setup on the correct host

Previously we were running this on the local host which would
always have been the master.  Now we use the new API call to
invoke the function on the appropriate target host.

Signed-off-by: Thomas Sanders <[email protected]>

Author: thomassa

ocaml/xapi/vgpuops.ml

@@ -115,7 +115,10 @@ let reserve_free_virtual_function ~__context vm pf =
     | None ->
       if retry then begin
         (* We may still need to load the driver... do that and try again *)
-        Xapi_pgpu.mxgpu_vf_setup ~__context;
+        let pf_host = Db.PCI.get_host ~__context ~self:pf in
+        Helpers.call_api_functions ~__context (fun rpc session_id ->
+          Client.Client.Host.mxgpu_vf_setup rpc session_id pf_host
+        );
         get false
       end else
         (* This probably means that our capacity checking went wrong! *)