hw/cpu/arm11mpcore: Fix introspection problem with 'arm11mpcore_priv'

hw/cpu/arm11mpcore: Fix introspection problem with 'arm11mpcore_priv'

Valgrind reports an error here:

echo "{'execute':'qmp_capabilities'} {'execute':'device-list-properties'," \
 "'arguments':{'typename':'arm11mpcore_priv'}}" \
 "{'execute': 'human-monitor-command', " \
 "'arguments': {'command-line': 'info qtree'}}" | \
 valgrind -q aarch64-softmmu/qemu-system-aarch64 -M none,accel=qtest -qmp stdio
[...]
==3145== Invalid read of size 8
==3145==    at 0x61873A: qdev_print (qdev-monitor.c:686)
==3145==    by 0x61873A: qbus_print (qdev-monitor.c:719)
[...]

Use sysbus_init_child_obj() to fix it.

Reviewed-by: Richard Henderson <[email protected]>
Reviewed-by: Paolo Bonzini <[email protected]>
Reviewed-by: Eduardo Habkost <[email protected]>
Signed-off-by: Thomas Huth <[email protected]>
Reviewed-by: Alistair Francis <[email protected]>
Message-id: 1531745974[email protected]
Signed-off-by: Peter Maydell <[email protected]>