sabre: convert from SABRE_DPRINTF macro to trace-events

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
CC: Michael S. Tsirkin <mst@redhat.com>
CC: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Artyom Tarasenko <atar4qemu@gmail.com>
[for addition of trace-events to hw/pci-host]
Acked-by: Michael S. Tsirkin <mst@redhat.com>