irqchip/ACPI: Introduce ACPI_IRQ_MODEL_LPIC for LoongArch

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



--------------------------------

For LoongArch, ACPI_IRQ_MODEL_LPIC is introduced, and high
level trigger type is set for PCI devices legacy irq.

Change-Id: I5f9d44e2d9c7d3492fedf89b64becac5fb5cc270
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
(cherry picked from commit 2c1c0b0c)