LoongArch: KVM: Rework pch_pic_update_batch_irqs()

Use proper bitmap API and drop all the housekeeping code.

Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
1 file changed