Booting VxWorks 7 with U-Boot on Cyclone V, take 2...

It turns out that I wasn't reading carefully enough. The Altera files that come with the booting VxWorks guide (https://www.altera.com/support/support-resources/download/rtos_tools.html) are not for the Terasic Cyclone V development kit that I have and thus the preloader isn't going to do the job it's expected. Rocketboards has a software lab that goes through building the preloader for the Terasic CV dev kit. That preloader was then used with the Altera provided documentation to make the bootable image used to see the u-boot data over a serial stream in step 3.