memory_region_allocate_system_memory() API is going away, so
replace it with memdev allocated MemoryRegion. The later is
initialized by generic code, so board only needs to opt in
to memdev scheme by providing
  MachineClass::default_ram_id
and using MachineState::ram instead of manually initializing
RAM memory region.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/ppc/mac_oldworld.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 7318d7e..66e434b 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -91,7 +91,6 @@ static void ppc_heathrow_init(MachineState *machine)
     CPUPPCState *env = NULL;
     char *filename;
     int linux_boot, i;
-    MemoryRegion *ram = g_new(MemoryRegion, 1);
     MemoryRegion *bios = g_new(MemoryRegion, 1);
     uint32_t kernel_base, initrd_base, cmdline_base = 0;
     int32_t kernel_size, initrd_size;
@@ -127,9 +126,7 @@ static void ppc_heathrow_init(MachineState *machine)
         exit(1);
     }
 
-    memory_region_allocate_system_memory(ram, NULL, "ppc_heathrow.ram",
-                                         ram_size);
-    memory_region_add_subregion(sysmem, 0, ram);
+    memory_region_add_subregion(sysmem, 0, machine->ram);
 
     /* allocate and load BIOS */
     memory_region_init_ram(bios, NULL, "ppc_heathrow.bios", BIOS_SIZE,
@@ -446,6 +443,7 @@ static void heathrow_class_init(ObjectClass *oc, void *data)
     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("750_v3.1");
     mc->default_display = "std";
     mc->ignore_boot_device_suffixes = true;
+    mc->default_ram_id = "ppc_heathrow.ram";
     fwc->get_dev_path = heathrow_fw_dev_path;
 }
 
-- 
2.7.4