I switched the defines to the original values:
uint32 io_info[][3] = {{PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12, 12},{PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13, 13},{PERIPHS_IO_MUX_MTMS_U, FUNC_GPIO14, 14},};
but that unfortunately didn't work... any other suggestions?