irqchip/gic-phytium-2500: Fix issue that interrupts are concentrated in one cpu

Phytium inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I41AUQ


CVE: NA

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Fix the issue that interrupts are concentrated in one cpu
for Phytium S2500 server.

Signed-off-by: Mao HongBo <maohongbo@phytium.com.cn>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>