KS869x: add new target

KS869x: add new target

This patch adds Micrel's KS869x target. The configuration was taken from
http://www.mmnt.net/db/0/0/www.micrel.com/ethernet/8695 - Micrel's
FTP server i.e. their OpenOCD 7.0 package.

The only change compared to the original file is the removal of
reset configuration, as it belongs to the board configuration.

Change-Id: Ic8509aa5fe5ce3166a3129e1c055280a3b2b9312
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Reviewed-on: http://openocd.zylin.com/2125
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>