hwmon/pmbus: (ir38064) Add of_match_table

Add the missing of_match_table to allow device tree probing.

Signed-off-by: Arthur Heymans <arthur.heymans@9elements.com>
Link: https://lore.kernel.org/r/20211213142814.264802-3-arthur.heymans@9elements.com


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