Staging: ipack: change the licence to explicitly GPLv2

Change the licence to explicitly GPLv2 to avoid possible conflicts in the
future.
Signed-off-by: NSamuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ipack/ipack.c

@@ -6,8 +6,7 @@
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
+ * Software Foundation; version 2 of the License.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

drivers/staging/ipack/ipack.h

@@ -6,8 +6,7 @@
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
+ * Software Foundation; version 2 of the License.
  */
 
 #include <linux/device.h>