Highmem on AXM and K2

[Stefan Wiehler]

Hi Arnd,

I would like to inform you that after some internal discussion, we
decided not to continue with my experiments to transition from
VMSPLIT_3G towards VMSPLIT_2G{_OPT} on the K2. The K2 is used in a
legacy product after all, and the more senior colleagues were quite
concerned about making such a major change due to various hacks that
might fall apart along the way.

Therefore, we will go the CIP path by staying with the last SLTS kernel
with full highmem support. Therefore, we would be very glad if this is
the case for at least the next SLTS kernel, supposedly to be released in
2027, as we should then be able (despite barely) to meet our projected
EOL of 2037. 

Thank you for your help so far!

Kind regards,

Stefan