sw64: pcie: enable PME and AER support

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I56XUF



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Refactor PME and AER relative codes to use builtin kernel module, one
can enable this feature support via selecting CONFIG_PCIEPORTBUS=y,
CONFIG_PCIE_PME=y and CONFIG_PCIEAER=y. Since PME and AER events route
to CPU by MSI mechanism has been hardcoded and lack of flexibility,
we use PCI INTx mechanism to handle these events.

Signed-off-by: Xu Chenjiao <xuchenjiao@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>