libipw: correct sparse warnings and mark some variables static

  CHECK   drivers/net/wireless/ipw2x00/libipw_module.c
drivers/net/wireless/ipw2x00/libipw_module.c:65:21: warning: symbol 'libipw_config_ops' was not declared. Should it be static?
drivers/net/wireless/ipw2x00/libipw_module.c:66:6: warning: symbol 'libipw_wiphy_privid' was not declared. Should it be static?
  CHECK   drivers/net/wireless/ipw2x00/libipw_wx.c
drivers/net/wireless/ipw2x00/libipw_wx.c:415:17: warning: symbol 'ssid' shadows an earlier one
drivers/net/wireless/ipw2x00/libipw_wx.c:324:9: originally declared here
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ipw2x00/libipw_module.c

@@ -62,8 +62,8 @@ MODULE_DESCRIPTION(DRV_DESCRIPTION);
 MODULE_AUTHOR(DRV_COPYRIGHT);
 MODULE_LICENSE("GPL");
 
-struct cfg80211_ops libipw_config_ops = { };
-void *libipw_wiphy_privid = &libipw_wiphy_privid;
+static struct cfg80211_ops libipw_config_ops = { };
+static void *libipw_wiphy_privid = &libipw_wiphy_privid;
 
 static int libipw_networks_allocate(struct libipw_device *ieee)
 {

drivers/net/wireless/ipw2x00/libipw_wx.c

@@ -411,10 +411,6 @@ int libipw_wx_set_encode(struct libipw_device *ieee,
 
 	/* If a new key was provided, set it up */
 	if (erq->length > 0) {
-#ifdef CONFIG_LIBIPW_DEBUG
-		DECLARE_SSID_BUF(ssid);
-#endif
-
 		len = erq->length <= 5 ? 5 : 13;
 		memcpy(sec.keys[key], keybuf, erq->length);
 		if (len > erq->length)