iwlwifi: replace IWL_ERROR with IWL_ERR

IWL_ERR doesn't use hidden priv pointer.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-led.c b/drivers/net/wireless/iwlwifi/iwl-led.c
index 11eccd7..98be90f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-led.c
+++ b/drivers/net/wireless/iwlwifi/iwl-led.c
@@ -254,7 +254,7 @@
 
 	ret = led_classdev_register(device, &led->led_dev);
 	if (ret) {
-		IWL_ERROR("Error: failed to register led handler.\n");
+		IWL_ERR(priv, "Error: failed to register led handler.\n");
 		return ret;
 	}