linux-linaro-dkb_git.bb: Add linaro linux kernel support for dkb board.

Signed-off-by: Haifeng Yan <yanhaifeng@gmail.com>
hi3716cv200-linaro.conf: Add a new machine hi3716cv200-linaro.

hi3716cv200-linaro is a machine to use linaro kernel.

Signed-off-by: Haifeng Yan <yanhaifeng@gmail.com>