iwl3945: fix sparse error

error is:
iwl3945-base.c:545:5: warning: symbol 'iwl3945_set_dynamic_key' was not
declared. Should it be static?
Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -542,7 +542,7 @@ static int iwl3945_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
 	return 0;
 }
 
-int iwl3945_set_dynamic_key(struct iwl_priv *priv,
+static int iwl3945_set_dynamic_key(struct iwl_priv *priv,
 			struct ieee80211_key_conf *keyconf, u8 sta_id)
 {
 	int ret = 0;