qemu: Do not ignore address for USB disks

(cherry picked from commit 8f708761)

AUTHORS

@@ -243,6 +243,7 @@ Patches have also been contributed by:
   Wido den Hollander   <wido@widodh.nl>
   Gene Czarcinski      <gene@czarc.net>
   Stefan Hajnoczi      <stefanha@redhat.com>
+  Vladislav Bogdanov   <bubble@hoster-ok.com>
 
   [....send patches to get your name here....]
 

src/qemu/qemu_command.c

@@ -2398,6 +2398,9 @@ qemuBuildDriveDevStr(virDomainDefPtr def,
         break;
     case VIR_DOMAIN_DISK_BUS_USB:
         virBufferAddLit(&opt, "usb-storage");
+
+        if (qemuBuildDeviceAddressStr(&opt, &disk->info, qemuCaps) < 0)
+            goto error;
         break;
     default:
         qemuReportError(VIR_ERR_INTERNAL_ERROR,