ASoC: wm8955: Fix a typo in 'wm8995_pll_factors()' function name

This should be 'wm8955_pll_factors()' instead.
Fix it and use it.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20190724052632.30476-1-christophe.jaillet@wanadoo.fr


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