Revert "soc/interconnect/packet: Don’t bypass dispatcher with a singl…

[rowanG077]

…e slave if it can be deselected."

This reverts commit 91f56aa.

I was updating litex in my project and the udpraw core stopped working while still responding to pings. After bisecting I found that this is the offending commit.

I'm not sure whether the udpraw core code is wrong or this is wrong... For now I have reverted this locally. If this is not the correct way forward please let me know as well.

[rowanG077]

Looking a bit deeper. The reason it goes wrong is that in the udpraw core I don't use sink_dst_port as a filter. I assume I receive all packets and then set the sink_dst_port only when I have an outgoing packet. It's kind of silly to use a signal which is technically only valid when transmitting a packet as the selector on the crossbar.