hw/net/xilinx_axienet: Cleanup stream->push assignment

Split the shared stream_class_init function to assign
stream->push with better type-safety.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200506082513.18751-3-edgar.iglesias@gmail.com>

hw/net/xilinx_axienet.c

@@ -1029,11 +1029,19 @@ static void xilinx_enet_class_init(ObjectClass *klass, void *data)
     dc->reset = xilinx_axienet_reset;
 }
 
-static void xilinx_enet_stream_class_init(ObjectClass *klass, void *data)
+static void xilinx_enet_control_stream_class_init(ObjectClass *klass,
+                                                  void *data)
 {
     StreamSlaveClass *ssc = STREAM_SLAVE_CLASS(klass);
 
-    ssc->push = data;
+    ssc->push = xilinx_axienet_control_stream_push;
+}
+
+static void xilinx_enet_data_stream_class_init(ObjectClass *klass, void *data)
+{
+    StreamSlaveClass *ssc = STREAM_SLAVE_CLASS(klass);
+
+    ssc->push = xilinx_axienet_data_stream_push;
 }
 
 static const TypeInfo xilinx_enet_info = {
@@ -1048,8 +1056,7 @@ static const TypeInfo xilinx_enet_data_stream_info = {
     .name          = TYPE_XILINX_AXI_ENET_DATA_STREAM,
     .parent        = TYPE_OBJECT,
     .instance_size = sizeof(struct XilinxAXIEnetStreamSlave),
-    .class_init    = xilinx_enet_stream_class_init,
-    .class_data    = xilinx_axienet_data_stream_push,
+    .class_init    = xilinx_enet_data_stream_class_init,
     .interfaces = (InterfaceInfo[]) {
             { TYPE_STREAM_SLAVE },
             { }
@@ -1060,8 +1067,7 @@ static const TypeInfo xilinx_enet_control_stream_info = {
     .name          = TYPE_XILINX_AXI_ENET_CONTROL_STREAM,
     .parent        = TYPE_OBJECT,
     .instance_size = sizeof(struct XilinxAXIEnetStreamSlave),
-    .class_init    = xilinx_enet_stream_class_init,
-    .class_data    = xilinx_axienet_control_stream_push,
+    .class_init    = xilinx_enet_control_stream_class_init,
     .interfaces = (InterfaceInfo[]) {
             { TYPE_STREAM_SLAVE },
             { }