ath: make gcc check format arguments of ath_print(), fix all misuses

Numeric channel is hard to get, so it won't be printed.  Replace Mhz
with MHz on the affected lines and add commas as needed.

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index e04835c..12069aa 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -206,7 +206,7 @@
 	r = ath9k_hw_reset(ah, hchan, fastcc);
 	if (r) {
 		ath_print(common, ATH_DBG_FATAL,
-			  "Unable to reset channel (%u Mhz) "
+			  "Unable to reset channel (%u MHz), "
 			  "reset status %d\n",
 			  channel->center_freq, r);
 		spin_unlock_bh(&sc->sc_resetlock);
@@ -869,7 +869,7 @@
 	r = ath9k_hw_reset(ah, ah->curchan, false);
 	if (r) {
 		ath_print(common, ATH_DBG_FATAL,
-			  "Unable to reset channel %u (%uMhz) ",
+			  "Unable to reset channel (%u MHz), "
 			  "reset status %d\n",
 			  channel->center_freq, r);
 	}
@@ -924,7 +924,7 @@
 	r = ath9k_hw_reset(ah, ah->curchan, false);
 	if (r) {
 		ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
-			  "Unable to reset channel %u (%uMhz) "
+			  "Unable to reset channel (%u MHz), "
 			  "reset status %d\n",
 			  channel->center_freq, r);
 	}