* Make linux-intel-lts v6.6.5 the default kernel for poky
* Make linux-intel-lts v6.6.5 the default RT kernel for poky
* Make mainline-tracking v6.7-rc3 the default kernel for poky-altcfg
* Maintain only one version of rt kernel

Signed-off-by: Yogesh Tyagi <yogesh.tyagi@intel.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>