adapters: support bulk connections

src/main/scala/amba/ahb/ToTL.scala

@@ -139,7 +139,7 @@ object AHBToTL
 {
   def apply()(x: AHBOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
     val tl = LazyModule(new AHBToTL)
-    tl.node := x
+    tl.node :=? x
     tl.node
   }
 }

src/main/scala/amba/axi4/Buffer.scala

@@ -62,7 +62,7 @@ object AXI4Buffer
     ar: BufferParams,
     r:  BufferParams)(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = {
     val buffer = LazyModule(new AXI4Buffer(aw, w, b, ar, r))
-    buffer.node := x
+    buffer.node :=? x
     buffer.node
   }
 }

src/main/scala/amba/axi4/Deinterleaver.scala

@@ -108,7 +108,7 @@ object AXI4Deinterleaver
   // applied to the AXI4 source node; y.node := AXI4Deinterleaver()(x.node)
   def apply(maxReadBytes: Int)(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = {
     val deinterleaver = LazyModule(new AXI4Deinterleaver(maxReadBytes))
-    deinterleaver.node := x
+    deinterleaver.node :=? x
     deinterleaver.node
   }
 }

src/main/scala/amba/axi4/Fragmenter.scala

@@ -208,7 +208,7 @@ object AXI4Fragmenter
   // applied to the AXI4 source node; y.node := AXI4Fragmenter()(x.node)
   def apply()(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = {
     val fragmenter = LazyModule(new AXI4Fragmenter)
-    fragmenter.node := x
+    fragmenter.node :=? x
     fragmenter.node
   }
 }

src/main/scala/amba/axi4/IdIndexer.scala

@@ -84,7 +84,7 @@ object AXI4IdIndexer
   // applied to the AXI4 source node; y.node := AXI4IdIndexer(idBits)(x.node)
   def apply(idBits: Int)(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = {
     val indexer = LazyModule(new AXI4IdIndexer(idBits))
-    indexer.node := x
+    indexer.node :=? x
     indexer.node
   }
 }

src/main/scala/amba/axi4/ToTL.scala

@@ -168,7 +168,7 @@ object AXI4ToTL
 {
   def apply()(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
     val tl = LazyModule(new AXI4ToTL)
-    tl.node := x
+    tl.node :=? x
     tl.node
   }
 }

src/main/scala/amba/axi4/UserYanker.scala

@@ -100,7 +100,7 @@ object AXI4UserYanker
   // applied to the AXI4 source node; y.node := AXI4UserYanker(idBits, maxFlight)(x.node)
   def apply(capMaxFlight: Option[Int] = None)(x: AXI4OutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): AXI4OutwardNode = {
     val yanker = LazyModule(new AXI4UserYanker(capMaxFlight))
-    yanker.node := x
+    yanker.node :=? x
     yanker.node
   }
 }