PPC: Fix via-cuda memory registration

Commit 23c5e4ca (convert to memory API) broke the VIA Cuda emulation layer
by not registering the IO structs.

This patch registers them properly and thus makes -M g3beige and -M mac99
work again.
Tested-by: NAndreas Färber <andreas.faerber@web.de>
Signed-off-by: NAlexander Graf <agraf@suse.de>

hw/cuda.c

@@ -634,16 +634,20 @@ static uint32_t cuda_readl (void *opaque, target_phys_addr_t addr)
     return 0;
 }
 
-static CPUWriteMemoryFunc * const cuda_write[] = {
-    &cuda_writeb,
-    &cuda_writew,
-    &cuda_writel,
-};
-
-static CPUReadMemoryFunc * const cuda_read[] = {
-    &cuda_readb,
-    &cuda_readw,
-    &cuda_readl,
+static MemoryRegionOps cuda_ops = {
+    .old_mmio = {
+        .write = {
+            cuda_writeb,
+            cuda_writew,
+            cuda_writel,
+        },
+        .read = {
+            cuda_readb,
+            cuda_readw,
+            cuda_readl,
+        },
+    },
+    .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
 static bool cuda_timer_exist(void *opaque, int version_id)
@@ -740,8 +744,8 @@ void cuda_init (MemoryRegion **cuda_mem, qemu_irq irq)
     s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
 
     s->adb_poll_timer = qemu_new_timer_ns(vm_clock, cuda_adb_poll, s);
-    cpu_register_io_memory(cuda_read, cuda_write, s,
-                                             DEVICE_NATIVE_ENDIAN);
+    memory_region_init_io(&s->mem, &cuda_ops, s, "cuda", 0x2000);
+
     *cuda_mem = &s->mem;
     vmstate_register(NULL, -1, &vmstate_cuda, s);
     qemu_register_reset(cuda_reset, s);