Provide jtagspi with information to use jtagspi for
programming spi-flash devices on xilinx devices
using a proxy bitstream.
Change-Id: I68000d71de25118ed8a8603e544cff1dc69bd9ba
Signed-off-by: Daniel Anselmi <danselmi@gmx.ch>
Reviewed-on: https://review.openocd.org/c/openocd/+/7836
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>