[media] use IS_ENABLED() macro

This patch introduces the use of IS_ENABLED() macro. For example,
replacing:
 #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
with:
 #if IS_ENABLED(CONFIG_I2C)
All changes made by this patch respect the same replacement pattern.

Reported-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Acked-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb-frontends/s5h1420.h b/drivers/media/dvb-frontends/s5h1420.h
index ff30813..210049b 100644
--- a/drivers/media/dvb-frontends/s5h1420.h
+++ b/drivers/media/dvb-frontends/s5h1420.h
@@ -40,7 +40,7 @@
 	u8 serial_mpeg:1;
 };
 
-#if defined(CONFIG_DVB_S5H1420) || (defined(CONFIG_DVB_S5H1420_MODULE) && defined(MODULE))
+#if IS_ENABLED(CONFIG_DVB_S5H1420)
 extern struct dvb_frontend *s5h1420_attach(const struct s5h1420_config *config,
 	     struct i2c_adapter *i2c);
 extern struct i2c_adapter *s5h1420_get_tuner_i2c_adapter(struct dvb_frontend *fe);