ath: Convert ath_print(.., ATH_DBG_FATAL to ath_err

So these errors are always emitted at KERN_ERR level.
Remove ARRAY_SIZE casts, use printf type %zu

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/gpio.c b/drivers/net/wireless/ath/ath9k/gpio.c
index 6a1a482..2b1b583 100644
--- a/drivers/net/wireless/ath/ath9k/gpio.c
+++ b/drivers/net/wireless/ath/ath9k/gpio.c
@@ -103,8 +103,8 @@
 
 	ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
 	if (ret)
-		ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
-			  "Failed to register led:%s", led->name);
+		ath_err(ath9k_hw_common(sc->sc_ah),
+			"Failed to register led:%s", led->name);
 	else
 		led->registered = 1;
 	return ret;