Since commit 
52d225346904 ("HID: Make lowlevel driver structs const")
the lowlevel HID drivers are only exposed as const.
Take advantage of this to constify the underlying structure, too.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230130-hid-const-ll-driver-v1-6-3fc282b3b1d0@weissschuh.net
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
        return -EIO;
 }
 
-static struct hid_ll_driver surface_hid_ll_driver = {
+static const struct hid_ll_driver surface_hid_ll_driver = {
        .start       = surface_hid_start,
        .stop        = surface_hid_stop,
        .open        = surface_hid_open,