[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/zl10039.h b/drivers/media/dvb-frontends/zl10039.h
index 5eee7ea..750b9bc 100644
--- a/drivers/media/dvb-frontends/zl10039.h
+++ b/drivers/media/dvb-frontends/zl10039.h
@@ -22,8 +22,9 @@
 #ifndef ZL10039_H
 #define ZL10039_H
 
-#if defined(CONFIG_DVB_ZL10039) || (defined(CONFIG_DVB_ZL10039_MODULE) \
-	    && defined(MODULE))
+#include <linux/kconfig.h>
+
+#if IS_ENABLED(CONFIG_DVB_ZL10039)
 struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe,
 					u8 i2c_addr,
 					struct i2c_adapter *i2c);