[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>

drivers/media/tuners/tda827x.h

@@ -50,7 +50,7 @@ struct tda827x_config
  * @param cfg optional callback function pointers.
  * @return FE pointer on success, NULL on failure.
  */
-#if defined(CONFIG_MEDIA_TUNER_TDA827X) || (defined(CONFIG_MEDIA_TUNER_TDA827X_MODULE) && defined(MODULE))
+#if IS_ENABLED(CONFIG_MEDIA_TUNER_TDA827X)
 extern struct dvb_frontend* tda827x_attach(struct dvb_frontend *fe, int addr,
 					   struct i2c_adapter *i2c,
 					   struct tda827x_config *cfg);