ASoC: Factor out I2C usage in WM8962 driver

The chip can actually support SPI so we shouldn't assume we've got an I2C
device even though that's the most common configuration.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
1 file changed