iio: proximity: ping: Replace OF specific code by device_get_match_data()

Instead of calling the OF specific API, use device_get_match_data().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220413183421.20427-1-andriy.shevchenko@linux.intel.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>