ASoC: fsl_micfil: do not define SHIFT/MASK for single bits

No need to have defines for the mask of single bits. Also shift is
unused. Drop all these unnecessary defines.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Link: https://lore.kernel.org/r/20220414162249.3934543-5-s.hauer@pengutronix.de


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