[media] media: bt8xx: constify sp887x_config structure

This sp887x_config structure is never modified, so declare it as const.

Done with the help of Coccinelle.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/pci/bt8xx/dvb-bt8xx.c

@@ -318,7 +318,7 @@ static int microtune_mt7202dtf_request_firmware(struct dvb_frontend* fe, const s
 	return request_firmware(fw, name, &bt->bt->dev->dev);
 }
 
-static struct sp887x_config microtune_mt7202dtf_config = {
+static const struct sp887x_config microtune_mt7202dtf_config = {
 	.demod_address = 0x70,
 	.request_firmware = microtune_mt7202dtf_request_firmware,
 };