Creotech PCB suppport 2/3: Move the generics definition to make common files independent of DDR core used. Add Top & UCF files. Update Manifests

This identation fix was done with the following command:

find . -type f -regextype posix-extended -iregex ".*(\.c|\.h|\.vhd)" | \
	xargs sed -i 's/  /\t/g'