ASoC: fsl_micfil: fix regmap_write_bits usage

The last parameter 1 means BIT(0), which should be the
correct BIT(X).

Fixes: 47a70e6f ("ASoC: Add MICFIL SoC Digital Audio Interface driver.")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://patch.msgid.link/1727424031-19551-2-git-send-email-shengjiu.wang@nxp.com


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