Basic qdev infrastructure.

Signed-off-by: Paul Brook <paul@codesourcery.com>
diff --git a/vl.c b/vl.c
index b43cdd1..40b1d8b 100644
--- a/vl.c
+++ b/vl.c
@@ -2565,6 +2565,8 @@
     case IF_MTD:
     case IF_VIRTIO:
         break;
+    case IF_COUNT:
+        abort();
     }
     if (!file[0])
         return -2;
@@ -5896,6 +5898,8 @@
         }
     }
 
+    module_call_init(MODULE_INIT_DEVICE);
+
     machine->init(ram_size, boot_devices,
                   kernel_filename, kernel_cmdline, initrd_filename, cpu_model);