V4L/DVB (4135): Cx88-tvaudio.c must #include <linux/config.h>

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/cx88/cx88-tvaudio.c

@@ -52,6 +52,7 @@
 #include <linux/init.h>
 #include <linux/smp_lock.h>
 #include <linux/delay.h>
+#include <linux/config.h>
 #include <linux/kthread.h>
 
 #include "cx88.h"