LoongArch: fix some PCIE card not scanning properly

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6BWFP



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Fix some pcie card not scanning properly when
bus number is inconsistent during firmware and
kernel scan phases.

Signed-off-by: liuyun <liuyun@loongson.cn>
Signed-off-by: Tianli Xiong <xiongtianli@loongson.cn>