hwmon: (pmbus/lm25066) Let compiler determine outer dimension of lm25066_coeff

Maintaining this manually is error prone (there are currently only
five chips supported, not six); gcc can do it for us automatically.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Fixes: 666c1490 ("hwmon: (pmbus/lm25066) Drop support for LM25063")
Link: https://lore.kernel.org/r/20210928092242.30036-5-zev@bewilderbeest.net


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