Now that the driver core allows for struct class to be in read-only
memory, mark hwmon_class as const.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20240614-class-const-hwmon-v1-1-27b910d06a90@weissschuh.netSigned-off-by: Guenter Roeck <linux@roeck-us.net>