It is pointless to overlap a memory subregion with priority 0.
Use the simpler memory_region_add_subregion() function.

This patch was produced with the following spatch script:

    @@
    expression region;
    expression offset;
    expression subregion;
    @@
    -memory_region_add_subregion_overlap(region, offset, subregion, 0)
    +memory_region_add_subregion(region, offset, subregion)

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/arm/xlnx-versal-virt.c | 3 +--
 hw/arm/xlnx-versal.c      | 4 ++--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c
index 462493c467..901e9ed86c 100644
--- a/hw/arm/xlnx-versal-virt.c
+++ b/hw/arm/xlnx-versal-virt.c
@@ -437,8 +437,7 @@ static void versal_virt_init(MachineState *machine)
 
     /* Make the APU cpu address space visible to virtio and other
      * modules unaware of muliple address-spaces.  */
-    memory_region_add_subregion_overlap(get_system_memory(),
-                                        0, &s->soc.fpd.apu.mr, 0);
+    memory_region_add_subregion(get_system_memory(), 0, &s->soc.fpd.apu.mr);
 
     s->binfo.ram_size = machine->ram_size;
     s->binfo.loader_start = 0x0;
diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
index 8b3d8d85b8..538d907f8a 100644
--- a/hw/arm/xlnx-versal.c
+++ b/hw/arm/xlnx-versal.c
@@ -281,8 +281,8 @@ static void versal_realize(DeviceState *dev, Error **errp)
     memory_region_init_ram(&s->lpd.mr_ocm, OBJECT(s), "ocm",
                            MM_OCM_SIZE, &error_fatal);
 
-    memory_region_add_subregion_overlap(&s->mr_ps, MM_OCM, &s->lpd.mr_ocm, 0);
-    memory_region_add_subregion_overlap(&s->fpd.apu.mr, 0, &s->mr_ps, 0);
+    memory_region_add_subregion(&s->mr_ps, MM_OCM, &s->lpd.mr_ocm);
+    memory_region_add_subregion(&s->fpd.apu.mr, 0, &s->mr_ps);
 }
 
 static void versal_init(Object *obj)
-- 
2.21.0