regmap-irq: Fix typo in comment

This is not a resource manager, it is a "Resource managed version of
regmap_add_irq_chip()". Fix the comment.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Link: https://lore.kernel.org/r/20220113144259.355845-1-luca@lucaceresoli.net


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