[media] dvb-frontends: use IS_ENABLED

Instead of checking everywhere there for 3 symbols, use instead
IS_ENABLED macro.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb-frontends/stb6000.h b/drivers/media/dvb-frontends/stb6000.h
index 7be479c..a768189 100644
--- a/drivers/media/dvb-frontends/stb6000.h
+++ b/drivers/media/dvb-frontends/stb6000.h
@@ -23,6 +23,7 @@
 #ifndef __DVB_STB6000_H__
 #define __DVB_STB6000_H__
 
+#include <linux/kconfig.h>
 #include <linux/i2c.h>
 #include "dvb_frontend.h"
 
@@ -34,8 +35,7 @@
  * @param i2c i2c adapter to use.
  * @return FE pointer on success, NULL on failure.
  */
-#if defined(CONFIG_DVB_STB6000) || (defined(CONFIG_DVB_STB6000_MODULE) \
-							&& defined(MODULE))
+#if IS_ENABLED(CONFIG_DVB_STB6000)
 extern struct dvb_frontend *stb6000_attach(struct dvb_frontend *fe, int addr,
 					   struct i2c_adapter *i2c);
 #else