rtlwifi: btcoexist: avoid format string in printk

Recent changes to this driver inadvertently reverted the change made by Kees
Cook in commit 6437f51ec3.

Reported-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtlwifi/btcoexist/halbtcoutsrc.h

@@ -117,7 +117,7 @@ extern u32 btc_dbg_type[];
 #define		WIFI_P2P_GC_CONNECTED			BIT4
 
 #define	CL_SPRINTF	snprintf
-#define	CL_PRINTF	printk
+#define	CL_PRINTF(buf)	printk("%s", buf)
 
 #define	BTC_PRINT(dbgtype, dbgflag, printstr, ...)		\
 	do {							\