realtek target needs help

[Hauke Mehrtens]

The realtek target supporting the Realtek switches is the only target in 
OpenWrt main still on Linux kernel 5.15, all other targets are at least 
on kernel 6.1, most of them are on Linux kernel 6.6.

The next OpenWrt major release will use kernel 6.6 only, all targets not 
migrated to kernel 6.6 will get removed from OpenWrt before branching. 
Looking at the status of OpenWrt main branch we will probably branch in 
the next 2 months.

Here is the overview of the Linux kernel 6.6 migration status:
https://github.com/openwrt/openwrt/issues/15192

There is a pull request to drop the realtek target from OpenWrt main:
https://github.com/openwrt/openwrt/pull/16052

A migration of the realtek target to Linux kernel 6.1 was started here:
https://github.com/openwrt/openwrt/pull/12726

Hauke