ASoC: ssm4567: Add support for setting the DAI format and TDM configuration

The SSM4567 has support for a couple of different DAI formats. In TDM mode
it is also possible to select the TDM slot. This patch adds support for this
by implementing the set_fmt and set_tdm_slot callbacks.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>