My BOOT.bin file created with the 2016.3 SDK "Create Boot Image" option contains an FSBL,ATF, and u-boot.
When I boot, I see ATF prints, but there is no u-boot print out.
If the image was built using the 2016.3 SDK "Create Boot Image" option, the exception levels are NOT properly specified in the .bif.
You will need to manually modify the .bif file to set the proper exception levels.
Below is a sample of a working .bif for FSBL + ATF + u-boot: