sw64: fix compile error for CONFIG_PCI=n

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I56QAM



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It fixes pci_domain_nr redefined error when CONFIG_PCI=n.

Signed-off-by: Zheng Chongzhen <zhengchongzhen@wxiat.com>

Signed-off-by: Gu Zitao <guzitao@wxiat.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>