[media] dvb: make DVB frontend *_ops instances "const"

These are immutable.  Making them "const" allows the compiler to move
them to the "rodata" section.

Note that cxd2841er_t_c_ops cannot be made "const", because
cxd2841er_attach() modifies it.  Ouch!

[mchehab@s-opensource.com: fix merge conflicts]
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/drivers/media/dvb-frontends/sp887x.c b/drivers/media/dvb-frontends/sp887x.c
index f9194b7..7c511c3 100644
--- a/drivers/media/dvb-frontends/sp887x.c
+++ b/drivers/media/dvb-frontends/sp887x.c
@@ -561,7 +561,7 @@ static void sp887x_release(struct dvb_frontend* fe)
 	kfree(state);
 }
 
-static struct dvb_frontend_ops sp887x_ops;
+static const struct dvb_frontend_ops sp887x_ops;
 
 struct dvb_frontend* sp887x_attach(const struct sp887x_config* config,
 				   struct i2c_adapter* i2c)
@@ -590,7 +590,7 @@ struct dvb_frontend* sp887x_attach(const struct sp887x_config* config,
 	return NULL;
 }
 
-static struct dvb_frontend_ops sp887x_ops = {
+static const struct dvb_frontend_ops sp887x_ops = {
 	.delsys = { SYS_DVBT },
 	.info = {
 		.name = "Spase SP887x DVB-T",