sysbus: remove sysbus_init_mmio_cb()

This problem with this function is that it is not reversible - it is
impossible to know where things are registered and unregister them
exactly.  As there are no more users, we can remove it.
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/sysbus.c

@@ -107,18 +107,6 @@ void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size,
     dev->mmio[n].iofunc = iofunc;
 }
 
-void sysbus_init_mmio_cb(SysBusDevice *dev, target_phys_addr_t size,
-                         mmio_mapfunc cb)
-{
-    int n;
-
-    assert(dev->num_mmio < QDEV_MAX_MMIO);
-    n = dev->num_mmio++;
-    dev->mmio[n].addr = -1;
-    dev->mmio[n].size = size;
-    dev->mmio[n].cb = cb;
-}
-
 void sysbus_init_mmio_cb2(SysBusDevice *dev,
                           mmio_mapfunc cb, mmio_mapfunc unmap)
 {

hw/sysbus.h

@@ -47,8 +47,6 @@ void sysbus_register_withprop(SysBusDeviceInfo *info);
 void *sysbus_new(void);
 void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size,
                       ram_addr_t iofunc);
-void sysbus_init_mmio_cb(SysBusDevice *dev, target_phys_addr_t size,
-                            mmio_mapfunc cb);
 void sysbus_init_mmio_cb2(SysBusDevice *dev,
                           mmio_mapfunc cb, mmio_mapfunc unmap);
 void sysbus_init_mmio_region(SysBusDevice *dev, MemoryRegion *memory);