gpio: pm8xxx-gpio: change the license header from CAF to LF

Use the new license header with The Linux Foundation instead of CAF.

Change-Id: I73afbaf73ba47a7adf2b45f7f2c02fde330d2344
Signed-off-by: Willie Ruan <wruan@codeaurora.org>
diff --git a/drivers/gpio/pm8xxx-gpio.c b/drivers/gpio/pm8xxx-gpio.c
index 92f697f..a972714 100644
--- a/drivers/gpio/pm8xxx-gpio.c
+++ b/drivers/gpio/pm8xxx-gpio.c
@@ -1,7 +1,4 @@
-/*
- * Qualcomm PMIC8XXX GPIO driver
- *
- * Copyright (c) 2011-2013, Code Aurora Forum. All rights reserved.
+/* Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and