Add support for ECP5 FPGA targets and board based on this chips:
Radiona ULX3S and Lambdaconcept ECPIX-5
Change-Id: I932fc6e2458cda7d63ac21579acddea5b53410bc
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-on: https://review.openocd.org/c/openocd/+/6112
Tested-by: jenkins
Reviewed-by: Oleksij Rempel <linux@rempel-privat.de>