stm class: SPDX-ify the documentation

Add the SPDX header to the STM class documentation.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/trace/stm.rst b/Documentation/trace/stm.rst
index 944994f..99f9996 100644 (file)
--- a/Documentation/trace/stm.rst
+++ b/Documentation/trace/stm.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 ===================
 System Trace Module
 ===================