[media] cx231xx: Declare MODULE_FIRMWARE usage

Cc: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NTim Gardner <tim.gardner@canonical.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx231xx/cx231xx-417.c

@@ -2193,3 +2193,5 @@ int cx231xx_417_register(struct cx231xx *dev)
 
 	return 0;
 }
+
+MODULE_FIRMWARE(CX231xx_FIRM_IMAGE_NAME);