The rb532 target has finally been removed in master, so drop the
dependencies in this package.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

The ar71xx target has finally been removed in master, so drop the
dependencies in this package.

Don't remove the patch for the TEW673GRU driver, as it may come
back with ath79.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>

* Update to latest version
* Refresh patches
* Update copyright years
* Fix musl build issues (patches already applied upstream)

Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>