rtlwifi: Optimize RT_TRACE macro use of KBUILD_MODNAME for size

Moving the KBUILD_MODNAME to the format reduces the
overall object size a small amount.

$ size drivers/net/wireless/rtlwifi/built-in.o*
   text	   data	    bss	    dec	    hex	filename
 586904	  55333	 127216	 769453	  bbdad	drivers/net/wireless/rtlwifi/built-in.o.new
 588901	  55333	 127216	 771450	  bc57a	drivers/net/wireless/rtlwifi/built-in.o.old

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtlwifi/debug.h

@@ -168,9 +168,9 @@ do {									\
 do {									\
 	if (unlikely(((comp) & rtlpriv->dbg.global_debugcomponents) &&	\
 		     ((level) <= rtlpriv->dbg.global_debuglevel))) {	\
-		printk(KERN_DEBUG "%s:%s():<%lx-%x> " fmt,		\
-		       KBUILD_MODNAME, __func__,			\
-		       in_interrupt(), in_atomic(), ##__VA_ARGS__);	\
+		printk(KERN_DEBUG KBUILD_MODNAME ":%s():<%lx-%x> " fmt,	\
+		       __func__, in_interrupt(), in_atomic(),		\
+		       ##__VA_ARGS__);					\
 	}								\
 } while (0)