Canny fifo dataflow update

[SHLegupMCHP]

Description: Prior to dataflow, when using function pipelines, SmartHLS did not support non-FIFO arguments to a sequence of function pipelines unless the non-FIFO argument was only used by the first function of the sequence. To work around this SmartHLS limitation in Training 1, we added the switch input as a FIFO that is always valid. This removes that hack which might have been confusing for the user. It also prevents all the dataflow functions being root functions.

Testing:

• Passes cosim
• Regenerated the training and tested that it works on the board
• Took the 2022.2 Libero zip project and replaced the canny_top component, still works on the board

[SHLegupMCHP]

Thanks, I updated the top message to add a description