add wifi driver fetch in tarball build.sh

guowenxue

2021-12-18 e69555668c6cdb951763008624e6e90a63ddbdd6

 bsp/build.sh

@@ -126,6 +126,7 @@
    fi
    do_action bootloader $action
    do_action kernel $action
    do_action drivers $action
elif [ $1 == "image" ] ; then
    do_root "yes"
    do_action rootfs $action