fuzz: specify audiodev for usb-audio

Fixes test-failure on Fedora 40 CI.

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20240527040711.311865-1-alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/fuzz/generic_fuzz_configs.h

@@ -150,7 +150,8 @@ const generic_fuzz_config predefined_configs[] = {
         "-chardev null,id=cd0 -chardev null,id=cd1 "
         "-device usb-braille,chardev=cd0 -device usb-ccid -device usb-ccid "
         "-device usb-kbd -device usb-mouse -device usb-serial,chardev=cd1 "
-        "-device usb-tablet -device usb-wacom-tablet -device usb-audio",
+        "-device usb-tablet -device usb-wacom-tablet "
+        "-device usb-audio,audiodev=snd0 -audiodev none,id=snd0",
         .objects = "*usb* *uhci* *xhci*",
     },{
         .name = "pc-i440fx",