Fix using Definitions as arguments to Definitions (backport #3726) (#3731)
* Fix using Definitions as arguments to Definitions (#3726) (cherry picked from commit a050b8cd) # Conflicts: # core/src/main/scala/chisel3/Module.scala # core/src/main/scala/chisel3/experimental/hierarchy/core/Definition.scala # core/src/main/scala/chisel3/experimental/hierarchy/core/Instance.scala # core/src/main/scala/chisel3/internal/Builder.scala * Resolve backport conflicts --------- Co-authored-by: Jack Koenig <koenig@sifive.com>