Moved the linking of the FIFO CPWritePointer near where CPWritePointer gets updated.  The CPWritePointer was getting updated while it was in-flight causing Pac-man Party to flicker.  Fixes issue 5223.
Merge pull request #1144 from skidau/fifo-linked

Moved the linking of the FIFO CPWritePointer near where CPWritePointer gets updated