[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: kbuild test robot <[e-mail]>
Acked-by: Lad, Prabhakar <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

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

···
 		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);