hi3716cv200-linaro.conf: Add auto-serial-console feature.

Add auto-serial-console feature to support auto login.

Signed-off-by: Haifeng Yan <yanhaifeng@gmail.com>
linux-linaro-dkb_git.bb: update kernel.

Update kernel srcrev to support sata, sd card, neon.

Signed-off-by: Haifeng Yan <yanhaifeng@gmail.com>
hisdk-minimal-image.bb: add hisdk-minimal-image.

Add hisdk-minimal-image.bb for minimal rootfs system.

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