Since we had changed to use event callback to deliver interrupt,

1.the pending_interruption is changed to pending_event,

2.get_ivr, set_tpr, get_tpr and set_eoi are not used or only used in the initialization phase. There is no need to write this code in assembly. this code is deleted.

3.hyper_ssm_i needs to be rewritten to jump to entchn_callback_handler intead of iva+0x3000 interrupt handler. I just disabled hyper_ssm_i, and do this later.