regulator: s2mpa01: Use rdev_get_id() to access id of regulator

Use regulator API rdev_get_id() to access id of regulator.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
1 file changed