genericarmv8: re-add auto-serial-console needed by LAVA
genericarmv8: re-add auto-serial-console needed by LAVA

Signed-off-by: Marcin Juszkiewicz <c7029741245584e1c88bcae5e15b82dba628e919@linaro.org>

linaro-home/meta-linaro,linaro-home/meta-linaro,xleng/meta-linaro,linaro-home/meta-linaro,xleng/meta-linaro,linaro-home/meta-linaro,xleng/meta-linaro,xleng/meta-linaro,xleng/meta-linaro,linaro-home/meta-linaro,linaro-home/meta-linaro