pinctrl: samsung: Use kmemdup_array instead of kmemdup for multiple allocation

Let the kmemdup_array() take care about multiplication
and possible overflows.

Using kmemdup_array() is more appropriate and makes the code
easier to audit.

Signed-off-by: Shen Lichuan <shenlichuan@vivo.com>
Link: https://lore.kernel.org/r/20240823114441.50648-1-shenlichuan@vivo.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>