iwlwifi: remove uneeded declarations

This patch cleans up iwlwifi by removing uneeded declarations and removing
uneeded symbol export reducing the namespace pollution. It also fixes some
typos in comments.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-scan.c

@@ -88,7 +88,7 @@ static int iwl_is_empty_essid(const char *essid, int essid_len)
 
 
 
-const char *iwl_escape_essid(const char *essid, u8 essid_len)
+static const char *iwl_escape_essid(const char *essid, u8 essid_len)
 {
 	static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 	const char *s = essid;
@@ -111,7 +111,6 @@ const char *iwl_escape_essid(const char *essid, u8 essid_len)
 	*d = '\0';
 	return escaped;
 }
-EXPORT_SYMBOL(iwl_escape_essid);
 
 /**
  * iwl_scan_cancel - Cancel any currently executing HW scan