media: docs: use SPDX GPL-2.0 OR GFDL-1.1 instead of text on *.svg files

There are some files that are dual licensed GPL and GFDL.

As SPDX v3.10 gained support for GFDL-1.1 with no invariant sections:

	https://spdx.org/licenses/GFDL-1.1-no-invariants-or-later.html

Let's remove the dual license text, replacing them by:

	SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Documentation/userspace-api/media/v4l/selection.svg

@@ -1,31 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!--
-    This file is dual-licensed: you can use it either under the terms
-    of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this
-    dual licensing only applies to this file, and not this project as a
-    whole.
-
-    a) This file is free software; you can redistribute it and/or
-       modify it under the terms of the GNU General Public License as
-       published by the Free Software Foundation version 2 of
-       the License.
-
-       This file is distributed in the hope that it will be useful,
-       but WITHOUT ANY WARRANTY; without even the implied warranty of
-       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-       GNU General Public License for more details.
-
-    Or, alternatively,
-
-    b) Permission is granted to copy, distribute and/or modify this
-       document under the terms of the GNU Free Documentation License,
-       Version 1.1 or any later version published by the Free Software
-       Foundation, with no Invariant Sections, no Front-Cover Texts
-       and no Back-Cover Texts. A copy of the license is included at
-       Documentation/userspace-api/media/fdl-appendix.rst.
-
-    TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections
--->
+<!-- SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later -->
 <svg enable-background="new" version="1" viewBox="0 0 4226.3 1686.8" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
  <defs>
   <pattern id="ig" xlink:href="#ka" patternTransform="matrix(5.4432 0 0 10.1 1722.4 161.06)"/>