V4L/DVB (6450): tda9887: add missing module license

This module was always GPL, and will remain GPL
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/tda9887.c

@@ -666,6 +666,8 @@ int tda9887_attach(struct tuner *t)
 }
 EXPORT_SYMBOL_GPL(tda9887_attach);
 
+MODULE_LICENSE("GPL");
+
 /*
  * Overrides for Emacs so that we follow Linus's tabbing style.
  * ---------------------------------------------------------------------------