media: docs: brainless mass add SPDX headers to all media files

All Documentation files outside the uAPI are all licensed with,
at least, GPL 2.0. So, mark them as such.

The ondes at media/uapi are at least GFDL 1.1+.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/Documentation/media/intro.rst b/Documentation/media/intro.rst
index f8960214741f..4a6bd665b884 100644
--- a/Documentation/media/intro.rst
+++ b/Documentation/media/intro.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 ============
 Introduction
 ============