ASoC: fsi-ak4642: Remove ak4642_add_i2c_device

I2C devices should be registered when platform board setting
in latest ASoC.

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
1 file changed