ASoC: wm8524: Add support S32_LE

Allow 32bit sample with this codec.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/cff745cc041c5208910821f0740f988926af8a66.1574418380.git.shengjiu.wang@nxp.com


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