This patch adds Cygnus audio DAI driver. It supports I2S, TDM
and SPDIF modes and uses three clocks derived from PLL.

This patchset has been tested on Cygnus wireless audio
bcm958305K board.
Signed-off-by: NLori Hikichi <lhikichi@broadcom.com>
Signed-off-by: NSimran Rai <ssimran@broadcom.com>
Reviewed-by: NRay Jui <rjui@broadcom.com>
Reviewed-by: NArun Parameswaran <arunp@broadcom.com>
Reviewed-by: NScott Branden <sbranden@broadcom.com>
Signed-off-by: NMark Brown <broonie@kernel.org>