[Refactor and sync kernel from Openwrt]

[Description]
Refactor and sync kernel from Openwrt

[Release-log]
N/A

80 files changed
tree: 06691f026e459feadabdb556a3bee4b8492fe955
  1. classes/
  2. conf/
  3. recipes-connectivity/
  4. recipes-devtools/
  5. recipes-kernel/