net: net_check_clients() runs too early to see -device, fix

Call it right after -device devices get created.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/net.c b/net.c
index f51d376..38b65f4 100644
--- a/net.c
+++ b/net.c
@@ -1275,7 +1275,7 @@
     }
 }
 
-static void net_check_clients(void)
+void net_check_clients(void)
 {
     VLANState *vlan;
 
@@ -1323,8 +1323,6 @@
         return -1;
     }
 
-    net_check_clients();
-
     return 0;
 }