ASoC: 88pm860x: remove unused variables 'pcm_switch_controls' and 'aif1_mux'

ASoC: 88pm860x: remove unused variables 'pcm_switch_controls' and 'aif1_mux'

sound/soc/codecs/88pm860x-codec.c:533:38: warning:
 pcm_switch_controls defined but not used [-Wunused-const-variable=]
sound/soc/codecs/88pm860x-codec.c:560:38: warning:
 aif1_mux defined but not used [-Wunused-const-variable=]

They are never used, so can be removed.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190815092547.29564-1-yuehaibing@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>