hwmon: (occ) Check for device property for setting OCC active during probe

A previous commit changed the existing behavior of the driver to skip
attempting to communicate with the OCC during probe. Return to the
previous default behavior of automatically communicating with the OCC
and make it optional with a new device-tree property.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220809200701.218059-4-eajames@linux.ibm.com


Signed-off-by: Joel Stanley <joel@jms.id.au>