jtag_interface.transports field was left uninitialized, which triggers warning message on program startup. Although hardware natively supports SWD interface, no software support currently present, so the value choosen to be <jtag_only>. Change-Id: I2da41790b1850950af416cec4362d5b7bf927b2b Signed-off-by: Alexander Osipenko <sipych@gmail.com> Reviewed-on: http://openocd.zylin.com/670 Tested-by: jenkins Reviewed-by: Xiaofan <xiaofanc@gmail.com> Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>