I assume you are using SCIF2 on the same pins that the RSK used (because you already configured u-boot correctly)
Even though the kernel check for the DTB early in boot, I have had the same looking log (no more messages after "console [tty0] enabled") when I didn't edit or program the DTB correctly.
You can also try to add "initcall_debug" to the kernel command line to get more output before it stops printing.
Chris