[Refactor and sync kernel from Openwrt]

[Description]
Refactor and sync kernel from Openwrt
1. NOTE: we change kernel url for ease sync lastest kernel

[Release-log]
N/A

74 files changed
tree: d2fafe53521b865af381aaa945fc8e83b0faea06
  1. classes/
  2. conf/
  3. recipes-connectivity/
  4. recipes-devtools/
  5. recipes-kernel/