net: dsa: make dsa_switch_ops const

Make these structures const as they are only stored in the ops field of
a dsa_switch structure, which is const.
Done using Coccinelle.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/dsa_loop.c

@@ -257,7 +257,7 @@ static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port,
 	return 0;
 }
 
-static struct dsa_switch_ops dsa_loop_driver = {
+static const struct dsa_switch_ops dsa_loop_driver = {
 	.get_tag_protocol	= dsa_loop_get_protocol,
 	.setup			= dsa_loop_setup,
 	.get_strings		= dsa_loop_get_strings,

drivers/net/dsa/lan9303-core.c

@@ -797,7 +797,7 @@ static void lan9303_port_disable(struct dsa_switch *ds, int port,
 	}
 }
 
-static struct dsa_switch_ops lan9303_switch_ops = {
+static const struct dsa_switch_ops lan9303_switch_ops = {
 	.get_tag_protocol = lan9303_get_tag_protocol,
 	.setup = lan9303_setup,
 	.get_strings = lan9303_get_strings,

drivers/net/dsa/mt7530.c

@@ -1017,7 +1017,7 @@ mt7530_setup(struct dsa_switch *ds)
 	return 0;
 }
 
-static struct dsa_switch_ops mt7530_switch_ops = {
+static const struct dsa_switch_ops mt7530_switch_ops = {
 	.get_tag_protocol	= mtk_get_tag_protocol,
 	.setup			= mt7530_setup,
 	.get_strings		= mt7530_get_strings,