regulator: cros-ec: use devm_kmemdup_array()

Convert to use devm_kmemdup_array() and while at it, make the size robust
against type changes.

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Link: https://patch.msgid.link/20250228072057.151436-3-raag.jadav@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: raagjadav

drivers/regulator/cros-ec-regulator.c

@@ -138,8 +138,8 @@ static int cros_ec_regulator_init_info(struct device *dev,
 	data->num_voltages =
 		min_t(u16, ARRAY_SIZE(resp.voltages_mv), resp.num_voltages);
 	data->voltages_mV =
-		devm_kmemdup(dev, resp.voltages_mv,
-			     sizeof(u16) * data->num_voltages, GFP_KERNEL);
+		devm_kmemdup_array(dev, resp.voltages_mv, data->num_voltages,
+				   sizeof(resp.voltages_mv[0]), GFP_KERNEL);
 	if (!data->voltages_mV)
 		return -ENOMEM;