The PCM179x family supports both SPI and I2C. This patch adds support
for the I2C interface.
Signed-off-by: NJacob Siverskog <jacob@teenage.engineering>
Reviewed-by: NJohan Hovold <johan@kernel.org>
Acked-by: NMichael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: NMark Brown <broonie@kernel.org>