iio: adc: ad7298: Enable on Intel Galileo Gen 1

Enable ADC on Intel Galileo Gen 1 board.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210412131835.70212-1-andriy.shevchenko@linux.intel.com


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