hw/ppc/prep: Drop useless inclusion of "hw/i386/pc.h"

In 47973a2 we split the last generic chipset out of the PC
board, but forgot to remove the include of "hw/i386/pc.h".
Since it is now unused, remove it.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

hw/ppc/prep.c

@@ -26,7 +26,6 @@
 #include "cpu.h"
 #include "hw/hw.h"
 #include "hw/timer/m48t59.h"
-#include "hw/i386/pc.h"
 #include "hw/char/serial.h"
 #include "hw/block/fdc.h"
 #include "net/net.h"