iwlwifi: fix various spelling and typos

Fixing various spelling errors and typos. Mostly in comments. In total
27 words were corrected, some of which occurred more than ones.

Signed-Of-By: Ian Schram <ischram@telenet.be>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-prph.h

@@ -8,7 +8,7 @@
  * Copyright(c) 2005 - 2007 Intel Corporation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU Geeral Public License as
+ * it under the terms of version 2 of the GNU General Public License as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful, but