[media] tuner-core: fix compilation if the media controller is not defined

drivers/media/v4l2-core/tuner-core.c:440:7: error: 'struct v4l2_subdev' has no member named 'entity'
     t->sd.entity.name = t->name;
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Acked-by: NLad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/v4l2-core/tuner-core.c

@@ -437,7 +437,9 @@ static void set_type(struct i2c_client *c, unsigned int type,
 		t->name = analog_ops->info.name;
 	}
 
+#ifdef CONFIG_MEDIA_CONTROLLER
 	t->sd.entity.name = t->name;
+#endif
 
 	tuner_dbg("type set to %s\n", t->name);