tcl/board: Add NXP FRDM-K64F

Change-Id: I4b8fbfb2948c4295c2a34d641dd59a73c512d9fa
Signed-off-by: Marc Schink <dev@zapb.de>
Reviewed-on: https://review.openocd.org/c/openocd/+/6884


Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>