ath: Add and use pr_fmt, convert printks to pr_<level>

Use a more current logging style.
Make sure all output is prefixed appropriately.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath5k/reset.c b/drivers/net/wireless/ath/ath5k/reset.c
index 200f165..0c2dd47 100644
--- a/drivers/net/wireless/ath/ath5k/reset.c
+++ b/drivers/net/wireless/ath/ath5k/reset.c
@@ -23,6 +23,8 @@
   Reset function and helpers
 \****************************/
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <asm/unaligned.h>
 
 #include <linux/pci.h>		/* To determine if a card is pci-e */