ASoC: cs35l41: Remove incorrect comment

The IRQ is not used for the PDN_DONE bit, this is polled during the DAPM
sequence, remove the misleading comment.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220105113026.18955-3-ckeepax@opensource.cirrus.com


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