Revert "Added GPL2 to repo as OpenWRT is GPL2 too."

This reverts commit 2fa25d5c3b9512259490a4b7f5b51d349d1b4966.

OpenWRT is not part of this repository. Furthermore in this repository
are more than just one software components.
packages/ffol: remove unused old ath9k-watchdog

Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>
bsp/defaul/network|showmacs: add license

Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>
.gitignore: do not ignore checked in packages

Signed-off-by: Tim Niemeyer <tim.niemeyer@mastersword.de>