Fixes #1071

Better crossings deployed to bus and tile wrappers

This makes it possible to treat chained composition associatively.
x := y :=? z :=* a ...

It also makes it easy to chain multiple optional adapters:
node :=? (Seq(a, b) ++ c ++ d)

* CSR provides a decode port to check for an illegal instruction.
   * This commit now allows for multiple instructions in decode to get this
      illegal instruction information.
   * This commit leverages the existing decodeWidth parameter. This will
      potentially over-provision the number of decode ports needed for
      RVC-enabled cores.

Closes #1068 

Add link to Diplomatic Design Patterns Paper

Fix address format

Add atomics support to DTS JSON file.

* Add a check that MaxHartIdBits is enough for all hartids

* Correct off-by-one error in hartid check

tilelink: cacheable resource permission 

We used to pack the addr_lo into user bits. We don't do that anymore.
There is thus no need to waste those bits, nor to pass that arg.