mfd: sec-i2c: Rework platform data and regmap instantiating

mfd: sec-i2c: Rework platform data and regmap instantiating

Instead of a large open-coded switch statement, just add both regmap
config and device type to the OF match data. This allows us to have all
related information in one place, and avoids a long switch() statement.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-17-d66d5f39b6bf@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>