This adds the mandatory Info documentation for the driver as well as
the usage field.
As a clean up, this also includes freeing of the allocated memory
which results in a memory leak if probe is invoked multiple times.
Valgrind-tested.
Reported by Dmitry Shpak.
Change-Id: I2b1d9b9e8b069c6665b11d880b40ce19a1b26ce6
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/2694
Tested-by: jenkins
Reviewed-by: Дмитрий Шпак <disona@yandex.ru>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
03b72c367c