arizona: anc: Correct setting of FCx_MIC_MODE_SEL

The mask rather than the shift is accidentally passed to the
SOC_ENUM_SINGLE macro which results in the wrong bits being set for this
control, change to using the shift to correct this.

Signed-off-by: Sapthagiri Baratam <sapthagiri.baratam@cirrus.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>