misc: enclosure: Use str_on_off() helper

Remove hard-coded strings by using the str_on_off() helper.

Signed-off-by: Yumeng Fang <fang.yumeng@zte.com.cn>
Link: https://lore.kernel.org/r/20250623202944425TQzPdeMtYA8qRtlrnwiR8@zte.com.cn


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>