Broken limit tests in example code

[andrewparlane]

libswd_drv_openocd.c:57 if (bits<0 && bits>8) return LIBSWD_ERROR_PARAM; this can never be true.

This code exists in a few places, the above is just one example.

Additionally, in the miso case, if this code was fixed to correctly check the range, we would easily hit a failure when reading ACKs (3 bits).

[cederom]

TODO