hwmon: (ibmaem) Directly use ida_alloc()/free()

Use ida_alloc()/ida_free() instead of deprecated
ida_simple_get()/ida_simple_remove() .

Signed-off-by: keliu <liuke94@huawei.com>
Link: https://lore.kernel.org/r/20220517063126.2142637-2-liuke94@huawei.com


[groeck: Updated subject to include driver name]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>