ASoC: wm8523: Fix a typo in a comment

It is likely that this header file is about the WM8523.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/20201002165908.637809-1-christophe.jaillet@wanadoo.fr


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