Add support for AC97 controllers found in Cirrus Logic EP93xx family SoCs.
Signed-off-by: NMika Westerberg <mika.westerberg@iki.fi>
Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>