hwmon: (oxp-sensors) Simplify logic of error return

Take return logic on error out of if-else, eliminating
duplicated code in tt_togle_store() function.

Signed-off-by: Joaquín Ignacio Aramendía <samsagax@gmail.com>
Link: https://lore.kernel.org/r/20230617181159.32844-3-samsagax@gmail.com


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