PCI: PM: Fix pcie mrrs restoring

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



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Don't limit mmrs during resume, so that saved value can be
restored.

Fix patch "PCI: loongson: Improve the MRRS quirk for LS7A"

Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Change-Id: I63c49e5c1d7e2a0a6eb3de9faa13cef1f94a4462