sound/soc/codecs/tlv320aic31xx.c:261:29: warning:
 cm_m_enum defined but not used [-Wunused-const-variable=]

It is never used, so can be removed.
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190815091738.21680-1-yuehaibing@huawei.comSigned-off-by: NMark Brown <broonie@kernel.org>