Set ftdi as the default driver to use in altera-usb-blaster.cfg
small cleanup
or1k: remove wrong if(\!step) and replace or32 by or1k for feature
jtag/core: add if (jtag->speed == NULL)
usb_blaster.c: remove .speed
Merge branch 'auto_tdesc' of github.com:Franck79/openOCD into auto_tdesc