makedevs: Don't use COPYING.patch just to add license file into ${S}

makedevs: Don't use COPYING.patch just to add license file into ${S}

* as it uses S = "${WORKDIR}" it's another possible reproducer for
  do_patch issue mentioned here:
  https://lists.yoctoproject.org/g/yocto/message/56602

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 4d5c5af4dc69df39934fe54500b3dac2fb7b8ae7)
Signed-off-by: Steve Sakoman <steve@sakoman.com>