!853 [sync] PR-809: LoongArch: defconfig: enable memory and pci hotplug...

!853 [sync] PR-809: LoongArch: defconfig: enable memory and pci hotplug related configs for LoongArch

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/809 
 
enable memory and pci hotplug related configs for LoongArch,
   used by LoongArch virtual machine now. 
 
Link:https://gitee.com/openeuler/kernel/pulls/853

 

Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>