Revert "virtio: Protect vqs list access"

This reverts commit 293180f5 which is
commit 0e566c8f upstream.

This breaks the Android kernel ABI, and this is not necessary for
Android devices, so revert it to preserve the ABI.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: If5aa2baf988b89e504b3b345651352215f571bf8