The datasheets for all STM32C0xx devices report that only SWD is
supported. No TDI/TDO pin is present.
Drop swj support.
Add swd transport.
Remove swd transport from the associated board files.
Change-Id: If6e630858aa64fbb3938a520604748f3f0ff7356
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/9423
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Ahmed Haoues <ahmed.haoues@st.com>
Tested-by: jenkins