[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/ves1820.h b/drivers/media/dvb-frontends/ves1820.h
index e902ed6..c073f35 100644
--- a/drivers/media/dvb-frontends/ves1820.h
+++ b/drivers/media/dvb-frontends/ves1820.h
@@ -41,7 +41,7 @@
 	u8 selagc:1;
 };
 
-#if defined(CONFIG_DVB_VES1820) || (defined(CONFIG_DVB_VES1820_MODULE) && defined(MODULE))
+#if IS_ENABLED(CONFIG_DVB_VES1820)
 extern struct dvb_frontend* ves1820_attach(const struct ves1820_config* config,
 					   struct i2c_adapter* i2c, u8 pwm);
 #else