media: vicodec: change codec license to LGPL

The FWHT codec can also be used by userspace utilities and libraries, but
since the current license is GPL and not LGPL it is not possible to include
it in e.g. gstreamer, since LGPL is required for that.

Change the license of these four files to LGPL.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Tom aan de Wiel <tom.aandewiel@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vicodec/codec-fwht.c

-// SPDX-License-Identifier: GPL-2.0+
+// SPDX-License-Identifier: LGPL-2.1+
 /*
  * Copyright 2016 Tom aan de Wiel
  * Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved.

drivers/media/platform/vicodec/codec-fwht.h

-/* SPDX-License-Identifier: GPL-2.0+ */
+/* SPDX-License-Identifier: LGPL-2.1+ */
 /*
  * Copyright 2016 Tom aan de Wiel
  * Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved.

drivers/media/platform/vicodec/codec-v4l2-fwht.c

-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: LGPL-2.1
 /*
  * A V4L2 frontend for the FWHT codec
  *

drivers/media/platform/vicodec/codec-v4l2-fwht.h

-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: LGPL-2.1 */
 /*
  * Copyright 2018 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
  */