Revert "Minimization of Parallel Items"

This reverts commit 3af30b1ce4365e6934ef220ff8aca41f24e3a989.
One-Iteration Limitation

This version of the hash algorithm limits the compression function main
loop to only one iteration. This was necessary because the NEXYX 2 FPGA
board used in this project could not handle running the standard 64
iterations simultaneously.