regulator: ROHM BDxxxxx minor print improvements

Merge series from Matti Vaittinen <mazziesaccount@gmail.com>:

Minor (printing) improvements for ROHM regulator drivers.

This series:

 - Drops an unnecessary info print from bd718x7.
   (Added a fixes tag for this but not really sure if worth
   adding to stable)
 - Convert the ROHM BDxxxxx PMIC regulator drivers to use dev_err_probe().
 - Change the probe logic for bd718x7 to favor the more usual devm-style
   where errors are returned immediately.