According to the data sheet data is clocked out on the falling edge
and latched on the rising edge of the bit clock. While the left sample
is transmitted the word clock line is low.
Signed-off-by: NDaniel Glöckner <dg@emlix.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

This patch adds a driver for the I2S interface found on Stretch s6000
family processors.
Signed-off-by: NDaniel Glöckner <dg@emlix.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>