Integrate seco-base/kirkstone-gm_c31
Commit: seco-base@3259f944
[CONFIGS][RK][C31] Fix machine config typos
Fix machine name: until now it worked because the SBC C31 is currently the fallback option for Rockchip.
Commit: seco-base@3259f944
[CONFIGS][RK][C31] Fix machine config typos
Fix machine name: until now it worked because the SBC C31 is currently the fallback option for Rockchip.