ASoC: pcm1681: Convert to params_width()
ASoC: pcm1681: Convert to params_width()

This will help support future enhancements in the way we negotiate
parameters in the core.

Signed-off-by: Mark Brown <b51b9a92386687a9ac927cebfa0f978adeb8cea5@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs