kernel-source from home:frank_kunz:lora_kernel project

For openSUSE Tumbleweed run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:frank_kunz:lora_kernel/openSUSE_Tumbleweed/home:frank_kunz:lora_kernel.repo
zypper refresh
zypper install kernel-source