[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/zl10036.h b/drivers/media/dvb-frontends/zl10036.h
index d84b8f8..5f1e821 100644
--- a/drivers/media/dvb-frontends/zl10036.h
+++ b/drivers/media/dvb-frontends/zl10036.h
@@ -21,6 +21,7 @@
 #ifndef DVB_ZL10036_H
 #define DVB_ZL10036_H
 
+#include <linux/kconfig.h>
 #include <linux/i2c.h>
 #include "dvb_frontend.h"
 
@@ -37,8 +38,7 @@
 	int rf_loop_enable;
 };
 
-#if defined(CONFIG_DVB_ZL10036) || \
-	(defined(CONFIG_DVB_ZL10036_MODULE) && defined(MODULE))
+#if IS_ENABLED(CONFIG_DVB_ZL10036)
 extern struct dvb_frontend *zl10036_attach(struct dvb_frontend *fe,
 	const struct zl10036_config *config, struct i2c_adapter *i2c);
 #else