contrib/firmware: update gpif FSM configuration file

Change the GPIF state machine, configuring only one of the 4 waveforms
to generate the clock signal (CCLK) used to program the FPGA, and send
one byte every cycle using an 8-bit bus.

Change-Id: I43cf5480b9d5c40cc2f6a62a52ecfe078b76458e
Signed-off-by: Ahmed BOUDJELIDA <aboudjelida@nanoxplore.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7976


Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins