l-loader: use += to expand do_configure task dependency on edk2-hikey do_deploy
l-loader: use += to expand do_configure task dependency on edk2-hikey do_deploy

Signed-off-by: Fathi Boudra <7cd6e55cc07a66bc71d7901a4cddfe6c22aab659@linaro.org>

fboudra/meta-96boards,mrchapp/meta-96boards,96boards/meta-96boards,kraj/meta-96boards,kraj/meta-96boards