device property: Fix reading pset strings using array access functions

				       const char *propname,

				       const char **strings, size_t nval)

{

	const struct property_entry *prop;

	const void *pointer;

	size_t length = nval * sizeof(*strings);

	size_t array_len, length;

	/* Find out the array length. */

	prop = pset_prop_get(pset, propname);

	if (!prop)

		return -EINVAL;

	if (!prop->is_array)

		/* The array length for a non-array string property is 1. */

		array_len = 1;

	else

		/* Find the length of an array. */

		array_len = pset_prop_count_elems_of_size(pset, propname,

							  sizeof(const char *));

	/* Return how many there are if strings is NULL. */

	if (!strings)

		return array_len;

	array_len = min(nval, array_len);

	length = array_len * sizeof(*strings);

	pointer = pset_prop_find(pset, propname, length);

	if (IS_ERR(pointer))

		return PTR_ERR(pointer);

	memcpy(strings, pointer, length);

	return 0;

}

		return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING,

					   val, nval);

	else if (is_pset_node(fwnode))

		return val ?

			pset_prop_read_string_array(to_pset_node(fwnode),

						    propname, val, nval) :

			pset_prop_count_elems_of_size(to_pset_node(fwnode),

						      propname,

						      sizeof(const char *));

		return pset_prop_read_string_array(to_pset_node(fwnode),

						   propname, val, nval);

	return -ENXIO;

}