how to build usb wifi driver (TL-WN821N) and add it to rootfs

Hi：

     I want to use usb wifi on bf548 based on uclinux-dist-2010  presented in the link:

     http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:drivers:wifi_over_usb&s[]=usb&s[]=wifi

     For step -----setup wifi ,I encountered some problems :

    1. can someone give some details on building the ath9k_htc driver for linux-2.6.34.7

          in this step ,I just refered the readme file ,I justed run:

        ./scripts/driver-select ath9k_htc

         make

      but the linux version is not 2.6.34.x .

    2. And how to add it to rootfs .

       I mean when I run menuconfig ,it appears in the options.

      (may be this question is some foolish....)

Thanks!