trace: split out trace events for hw/net/ directory

Move all trace-events for files in the hw/net/ directory to
their own file.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Message-id: 1466066426-16657-11-git-send-email-berrange@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Makefile.objs

@@ -127,3 +127,4 @@ trace-events-y += block/trace-events
 trace-events-y += hw/block/trace-events
 trace-events-y += hw/char/trace-events
 trace-events-y += hw/intc/trace-events
+trace-events-y += hw/net/trace-events