pnv: Fix build failures on some host platforms

This makes some changes to fix build failures on the 'min-glib' docker
image, and maybe other platforms with a buildchain that's less tolerant
about duplicated typedefs.
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

include/hw/ppc/pnv.h

@@ -21,6 +21,7 @@
 
 #include "hw/boards.h"
 #include "hw/sysbus.h"
+#include "hw/ipmi/ipmi.h"
 #include "hw/ppc/pnv_lpc.h"
 #include "hw/ppc/pnv_psi.h"
 #include "hw/ppc/pnv_occ.h"
@@ -118,8 +119,6 @@ typedef struct PnvChipClass {
 #define POWERNV_MACHINE(obj) \
     OBJECT_CHECK(PnvMachineState, (obj), TYPE_POWERNV_MACHINE)
 
-typedef struct IPMIBmc IPMIBmc;
-
 typedef struct PnvMachineState {
     /*< private >*/
     MachineState parent_obj;

include/hw/ppc/pnv_lpc.h

@@ -19,12 +19,12 @@
 #ifndef _PPC_PNV_LPC_H
 #define _PPC_PNV_LPC_H
 
+#include "hw/ppc/pnv_psi.h"
+
 #define TYPE_PNV_LPC "pnv-lpc"
 #define PNV_LPC(obj) \
      OBJECT_CHECK(PnvLpcController, (obj), TYPE_PNV_LPC)
 
-typedef struct PnvPsi PnvPsi;
-
 typedef struct PnvLpcController {
     DeviceState parent;
 

include/hw/ppc/pnv_occ.h

@@ -19,11 +19,11 @@
 #ifndef _PPC_PNV_OCC_H
 #define _PPC_PNV_OCC_H
 
+#include "hw/ppc/pnv_psi.h"
+
 #define TYPE_PNV_OCC "pnv-occ"
 #define PNV_OCC(obj) OBJECT_CHECK(PnvOCC, (obj), TYPE_PNV_OCC)
 
-typedef struct PnvPsi PnvPsi;
-
 typedef struct PnvOCC {
     DeviceState xd;