This reduces the wrong of device tree only IIO drivers that might
be copied by converting over this simple case.
Makes use of the new _scoped() handling to automatically release
the fwnode_handle on early exit from the loop.

Cc: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240218172731.1023367-5-jic23@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>