spapr: Eliminate SPAPR_PCI_2_7_MMIO_WIN_SIZE macro

The macro is only used in one place, where the purpose of the
value is obvious.  Eliminate the macro so we don't need to rely
on stringify().
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Message-Id: <20190107193020.21744-2-ehabkost@redhat.com>
Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: NDavid Gibson <david@gibson.dropbear.id.au>
Reviewed-by: NCornelia Huck <cohuck@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>

hw/ppc/spapr.c

@@ -4285,7 +4285,7 @@ static void spapr_machine_2_7_class_options(MachineClass *mc)
         {
             .driver   = TYPE_SPAPR_PCI_HOST_BRIDGE,
             .property = "mem_win_size",
-            .value    = stringify(SPAPR_PCI_2_7_MMIO_WIN_SIZE),
+            .value    = "0xf80000000",
         },
         {
             .driver   = TYPE_SPAPR_PCI_HOST_BRIDGE,

include/hw/pci-host/spapr.h

@@ -101,7 +101,6 @@ struct sPAPRPHBState {
 #define SPAPR_MAX_PHBS ((SPAPR_PCI_LIMIT - SPAPR_PCI_BASE) / \
                         SPAPR_PCI_MEM64_WIN_SIZE - 1)
 
-#define SPAPR_PCI_2_7_MMIO_WIN_SIZE  0xf80000000
 #define SPAPR_PCI_IO_WIN_SIZE        0x10000
 
 #define SPAPR_PCI_MSI_WINDOW         0x40000000000ULL