hw/intc/loongarch_extioi: Inherit from loongarch_extioi_common

Set TYPE_LOONGARCH_EXTIOI inherit from TYPE_LOONGARCH_EXTIOI_COMMON
object, it shares vmsate and property of TYPE_LOONGARCH_EXTIOI_COMMON,
and has its own realize() function.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Song Gao <gaosong@loongson.cn>
5 files changed