iio: pressure: dlhl60d: Use separate structures rather than an array for chip info

Change the dlhl60d driver to use individual chip info structures instead
of an array. This reduces the verbosity of the code. Also, the data is
now const as it should have been in the first place.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250628-iio-const-data-24-v2-1-1c90073d1323@baylibre.com


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