tcl/board: add Marsohod3 FPGA board config

tcl/board: add Marsohod3 FPGA board config

Marsohod3 is a cheap FPGA Development and Education board.
Please see http://www.marsohod.org/plata-marsokhod3 for details.

Sample usage:

  openocd -f board/marsohod3.cfg -c init -c "svf -tap 10m50.tap project.svf" -c shutdown

Change-Id: Ie5f43e696bbd1f3be2710c3916e808359f6e8d18
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Reviewed-on: http://openocd.zylin.com/3606
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>