Merge Pull Request from: @hygon_fanwh 
 
Avoid the northbridge init failure warning in guest since there is no northbridge.

References:
https://gitee.com/openeuler/kernel/pulls/15149 
 
Link:https://gitee.com/openeuler/kernel/pulls/15226

 

Reviewed-by: Li Nan <linan122@huawei.com>
Signed-off-by: Li Nan <linan122@huawei.com>