[PATCH v1 0/1] iio: adc: ad7192: Refactor filter config

[Alisa-Dariana Roman]

Dear maintainers,

Here is a pretty voluminous patch improving the filter setup for AD7192
and similar chips.

I removed the write options for two attributes and I know that is
questionable. I am sending this version just in case it is still viable
since I think the driver is a lot cleaner like this.

I also modified the size of the 3db filter low pass available attribute
since AD7193/AD7194 have 16 filter modes, unlike the other chips that
have 4.

Note that I moved a few of the functions around to be able to use them
where needed.

Have a great weekend!

Kind regards,
Alisa-Dariana Roman.