ASoC: samsung: i2s: Move IP variant data to common driver data structure

The IP variant data is another thing common for both DAIs, move it
to the driver's common data structure.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>