Beginning with Loongson-3C6000, there can be up to 8 PCI hosts for
multi-chip machines. To support these machines, increase the number of
entries in mcfg_quirks to 8.

Link: https://lore.kernel.org/r/20240726092911.2042656-1-chenhuacai@loongson.cnSigned-off-by: Haowei Zheng <zhenghaowei@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>