hwmon: (peci/cputemp) Fix off-by-one in coretemp_label allocation

The find_last_bit() call produces the index of the highest-numbered
core in core_mask; because cores are numbered from zero, the number of
elements we need to allocate is one more than that.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Cc: stable@kernel.org # v5.18
Fixes: bf3608f3 ("hwmon: peci: Add cputemp driver")
Reviewed-by: Iwona Winiarska <iwona.winiarska@intel.com>
Link: https://lore.kernel.org/r/20230202021825.21486-1-zev@bewilderbeest.net


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