ath9k: add missing %pV printk revert

SVN-Revision: 24480

package/mac80211/patches/018-revert_printk_va_format.patch

@@ -186,3 +186,24 @@
  	va_end(args);
  }
  #endif /* DEBUG */
+--- a/drivers/net/wireless/ath/main.c
++++ b/drivers/net/wireless/ath/main.c
+@@ -60,16 +60,13 @@ EXPORT_SYMBOL(ath_rxbuf_alloc);
+ int ath_printk(const char *level, struct ath_common *common,
+ 	       const char *fmt, ...)
+ {
+-	struct va_format vaf;
+ 	va_list args;
+ 	int rtn;
+ 
+ 	va_start(args, fmt);
+ 
+-	vaf.fmt = fmt;
+-	vaf.va = &args;
+-
+-	rtn = printk("%sath: %pV", level, &vaf);
++	printk("%sath: ", level);
++	rtn = vprintk(fmt, args);
+ 
+ 	va_end(args);
+