hwmon: (occ) Replace open-coded variant of %*phN specifier

printf()-like functions in the kernel have extensions, such as
%*phN to dump small pieces of memory as hex bytes.

Replace custom approach with the direct use of %*phN.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220726143110.4809-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>