Mark lantiq and omap as source only

[Nick]

On 5/4/23 17:51, Stijn Segers wrote:
> Hi,
>
> Robert Marko <robimarko at gmail.com> schreef op 3 mei 2023 11:21:32 CEST:
>> On Wed, 3 May 2023 at 11:08, Nick <vincent at systemli.org> wrote:
>>> I would also love to see a release. It is now already delayed more than
>>> a month [0] (actual branching should be happening end of march).
>>> However, I don't have a strong opinion on this. It's sad that lantiq
>>> targets could be dropped. 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 would also really like a new release to branch off sooner rather than later,
>> there has been plenty of time for all targets to stabilize on 5.15.
> I fully agree. Seems source-only is the jolt that omap and lantiq need (I know the latter is a popular target).
>
> Lots of people pining for 6.1 support in main etc, so let's branch that baby so we can move on.
>
> Stijn

I wanted to do some cleanup (removing 5.10 completely) so we can soon 
release:
https://github.com/openwrt/openwrt/pull/12531

However, if we still keep omap and ath25 around without bumping them to 
5.15, build will give warnings in the form of:

> /home/nick/openwrt/include/kernel-version.mk:11: *** Missing kernel 
> version/hash file for 5.10. Please create 
> /home/nick/openwrt/include/kernel-5.10.  Stop.