Documentation/hwmon: Move misplaced entry in hwmon docs index

Move the entry for the inspur-ipsps1 driver so that it no
longer appears in the hwmon docs TOC as a document relating
to the hwmon subsystem itself.

Signed-off-by: James Seo <james@equiv.tech>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20230504075752.1320967-2-james@equiv.tech


Signed-off-by: Guenter Roeck <linux@roeck-us.net>