memory: ti-aemif: Wrap CS timings into a struct

memory: ti-aemif: Wrap CS timings into a struct

CS timings are store in the struct aemif_cs_data along with other CS
parameters. It isn't convenient for exposing CS timings to other drivers
without also exposing the other parameters.

Wrap the CS timings in a new struct aemif_cs_timings to simplify their
export in upcoming patches.

Signed-off-by: Bastien Curutchet <bastien.curutchet@bootlin.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20241204094319.1050826-4-bastien.curutchet@bootlin.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>