IDE: replace DEBUG_IDE with tracing system

IDE: replace DEBUG_IDE with tracing system

Remove the DEBUG_IDE preprocessor definition with something more
appropriately flexible, using the trace-events subsystem.

This will be less prone to bitrot and will more effectively allow
us to target just the functions we care about.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170901001502.29915-2-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>