ASoC: ux500: Swap even/odd AD slot definitions

AD slots definitions for ab8500 codec were erroneously swapped between
even and odd channels.  Fix this by swapping the definitions to be
coherent with the channel number.

Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>