memstick: core: make memstick_bus_type const

Now that the driver core can properly handle constant struct bus_type,
move the memstick_bus_type variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20240204-bus_cleanup-memstick-v1-1-14809d4405d8@marliere.netSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/memstick/core/memstick.c

@@ -164,7 +164,7 @@ static struct attribute *memstick_dev_attrs[] = {
 };
 ATTRIBUTE_GROUPS(memstick_dev);
 
-static struct bus_type memstick_bus_type = {
+static const struct bus_type memstick_bus_type = {
 	.name           = "memstick",
 	.dev_groups	= memstick_dev_groups,
 	.match          = memstick_bus_match,