hw/ppc: set machine->fdt in pegasos2_machine_reset()

We'll introduce a QMP/HMP command that requires machine->fdt to be set
properly.

Cc: BALATON Zoltan <balaton@eik.bme.hu>
Cc: qemu-ppc@nongnu.org
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220926173855.1159396-12-danielhb413@gmail.com>

hw/ppc/pegasos2.c

@@ -331,6 +331,10 @@ static void pegasos2_machine_reset(MachineState *machine)
 
     vof_build_dt(fdt, pm->vof);
     vof_client_open_store(fdt, pm->vof, "/chosen", "stdout", "/failsafe");
+
+    /* Set machine->fdt for 'dumpdtb' QMP/HMP command */
+    machine->fdt = fdt;
+
     pm->cpu->vhyp = PPC_VIRTUAL_HYPERVISOR(machine);
 }