greybus: add copyright statements
The Greybus audio source files included no copyright statements.
Add them.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
diff --git a/drivers/staging/greybus/audio-pcm.c b/drivers/staging/greybus/audio-pcm.c
index a1faf78..c1b6aa5 100644
--- a/drivers/staging/greybus/audio-pcm.c
+++ b/drivers/staging/greybus/audio-pcm.c
@@ -1,3 +1,12 @@
+/*
+ * Greybus audio Pulse Code Modulation (PCM) driver
+ *
+ * Copyright 2015 Google Inc.
+ * Copyright 2015 Linaro Ltd.
+ *
+ * Released under the GPLv2 only.
+ */
+
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/interrupt.h>