hw/timer/sh_timer: Fix timer memory region size

The timer unit only has registers that fit in a region 0x30 bytes
long. No need to have the timer region larger than that.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <b1cd196cf1395a602c7a08a4f858e69e50c446a1.1635550060.git.balaton@eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

hw/timer/sh_timer.c

@@ -350,15 +350,14 @@ void tmu012_init(MemoryRegion *sysmem, hwaddr base, int feat, uint32_t freq,
                                     ch2_irq0); /* ch2_irq1 not supported */
     }
 
-    memory_region_init_io(&s->iomem, NULL, &tmu012_ops, s,
-                          "timer", 0x100000000ULL);
+    memory_region_init_io(&s->iomem, NULL, &tmu012_ops, s, "timer", 0x30);
 
     memory_region_init_alias(&s->iomem_p4, NULL, "timer-p4",
-                             &s->iomem, 0, 0x1000);
+                             &s->iomem, 0, memory_region_size(&s->iomem));
     memory_region_add_subregion(sysmem, P4ADDR(base), &s->iomem_p4);
 
     memory_region_init_alias(&s->iomem_a7, NULL, "timer-a7",
-                             &s->iomem, 0, 0x1000);
+                             &s->iomem, 0, memory_region_size(&s->iomem));
     memory_region_add_subregion(sysmem, A7ADDR(base), &s->iomem_a7);
     /* ??? Save/restore.  */
 }