regulator: Correct kernel-doc inconsistency

Silence documentation build warning by correcting kernel-doc comments.

./include/linux/regulator/machine.h:196: warning: Function parameter or member 'max_uV_step' not described in 'regulation_constraints'
./include/linux/regulator/driver.h:206: warning: Function parameter or member 'resume' not described in 'regulator_ops'

Signed-off-by: Colton Lewis <colton.w.lewis@protonmail.com>
Link: https://lore.kernel.org/r/20200715191438.29312-1-colton.w.lewis@protonmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>