iio: adc: pac1934: Replace strange way of checking type of enumeration

iio: adc: pac1934: Replace strange way of checking type of enumeration

When device is enumerated via ACPI the respective device node is of
ACPI device type. Use that to check for ACPI enumeration, rather than
calling for full match which is O(n) vs. O(1) for the regular check.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Marius Cristea <marius.cristea@microchip.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20241024191200.229894-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>