fpga: altera_freeze_bridge: Constify ops

The ops are not changing, make them const.
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Cc: Alan Tull <atull@kernel.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-fpga@vger.kernel.org
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/fpga/altera-freeze-bridge.c

@@ -203,7 +203,7 @@ static int altera_freeze_br_enable_show(struct fpga_bridge *bridge)
 	return priv->enable;
 }
 
-static struct fpga_bridge_ops altera_freeze_br_br_ops = {
+static const struct fpga_bridge_ops altera_freeze_br_br_ops = {
 	.enable_set = altera_freeze_br_enable_set,
 	.enable_show = altera_freeze_br_enable_show,
 };