Mark lantiq and omap as source only

[Nick]

On 5/3/23 11:07, Nick wrote:

> I will also try to fetch me some lantiq device from somewhere to 
> support fixing the fdb issues and re-adding it back to 23.X or fixing 
> it before the branch. 
I organized myself now a **FRITZ!Box 7320** and **TP Link TD-W8970**. So 
if anyone wants me to test anything just write me. Meanwhile I will also 
have a look at this issue.

Bests
Nick