V4L/DVB (4492): [dvb_attach] dvb_frontend_detach fix

dvb_frontend_detach() used invalid config option CONFIG_DVB_DETACH,
so dvb_frontend_detach() did not call symbol_put_addr().
Replaced CONFIG_DVB_DETACH by CONFIG_DVB_CORE_ATTACH.
Signed-off-by: NOliver Endriss <o.endriss@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/dvb/dvb-core/dvb_frontend.c

@@ -1113,7 +1113,7 @@ int dvb_unregister_frontend(struct dvb_frontend* fe)
 }
 EXPORT_SYMBOL(dvb_unregister_frontend);
 
-#ifdef CONFIG_DVB_DETACH
+#ifdef CONFIG_DVB_CORE_ATTACH
 void dvb_frontend_detach(struct dvb_frontend* fe)
 {
 	void *ptr;