hw/intc/loongarch_extioi: Replace legacy reset callback with new api

Replace legacy reset callback register device_class_set_legacy_reset()
with new function resettable_class_set_parent_phases(). With new API,
it will call reset callback of parent object and then itself.

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