384K support in roon image build download

@Gordon_Garrity hit Gordon, I see dietpi is now suppprting 384K in their kernel - will we see something for the IQAudIO image soon? And which of you hats will suppprt it?

The 384 changes are not in the main line linux distribution so it needs a specific build. We prefer to stick with mainline code base and not apply such changes but Moodeaudio.org have used these changes already with our boards and if DietPi has included the necessary changes then that may be an option for you too.

@spockfish Harry are you aware of the kernel needs for the IQAudIO boards? These boards are now supplied under the Raspberry Pi branding it seems.