greybus: add Linaro copyrights

I was asked to add a Linaro copyright to all Greybus source files
that anyone at Linaro has modified.  This patch does that.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
diff --git a/drivers/staging/greybus/debugfs.c b/drivers/staging/greybus/debugfs.c
index 4755a36..770b7c0 100644
--- a/drivers/staging/greybus/debugfs.c
+++ b/drivers/staging/greybus/debugfs.c
@@ -2,6 +2,7 @@
  * Greybus debugfs code
  *
  * Copyright 2014 Google Inc.
+ * Copyright 2014 Linaro Ltd.
  *
  * Released under the GPLv2 only.
  */