Add initial files from below two repositories for compat and cfg8011 modules of ath6kl_usb branch

compat :
  git clone https://github.com/senthilb/ath6kl-compat-wireless.git
  cd ath6kl-compat-wireless
  git checkout -b 7b33cfd
  clone the "compat", "include", "udev" and "compat/scripts/compat_firmware_install" directories as COMPAT module for ath6kl_usb

cfg80211 :
  git clone http://github.com/kvalo/ath6kl.git
  cd ath6kl
  git checkout 009f2ea7c0a3009b44940d820e407a21f3d53d52
  clone the "ath6kl/net/wireless" directory as CFG80211 for ath6kl_usb developing