regulator: consumer.rst: fix 'regulator_enable' typo.

Removing an erroneous 'd' at the end of 'regulator_enable'.

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/1682537582-2314-1-git-send-email-Philippe.DeMuyter@macq.eu


Signed-off-by: Mark Brown <broonie@kernel.org>