Add support for enabling I2S controller on FSD platform.

FSD I2S controller is based on Exynos7 I2S controller, supporting
2CH playback/capture in I2S mode and 7.1CH playback/capture in TDM
mode.
Signed-off-by: Padmanabhan Rajanbabu <p.rajanbabu@samsung.com>
Link: https://lore.kernel.org/r/20230116103823.90757-3-p.rajanbabu@samsung.comSigned-off-by: Mark Brown <broonie@kernel.org>