vm/qemu: don't enable usb/sound by default
vm/qemu: don't enable usb/sound by default

Such options can be enabled in qemu_args if necessary.

xairy/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller