MIPS: Loongson-3: Add IRQF_NO_SUSPEND to Cascade irqaction

HPET irq is routed to i8259 and then to MIPS CPU irq (cascade). After
commit a3e6c1ef (MIPS: IRQ: Fix disable_irq on CPU IRQs), if without
IRQF_NO_SUSPEND in cascade_irqaction, HPET interrupts will lost during
suspend. The result is machine cannot be waken up.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: <stable@vger.kernel.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/9528/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>