DM: add interface to set intr storm monitor params

modify and add interface to set interrupt monitor params;
it can be set by acrn-dm input arguments like following:
--intr_monitor 10000,10,1,100

the 4 params order is:
    interrupt storm theshold per second,
    probe period to get interrupt data,
    pass-through devices' interrupt injection delay time,
    delay duration, after it, stop injection & restore to normal

Tracked-On: #1724
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Yin Fengwei <fengwei.yin@intel.com>

devicemodel/include/monitor.h

@@ -33,4 +33,5 @@ int monitor_register_vm_ops(struct monitor_vm_ops *ops, void *arg,
 /* helper functions for vm_ops callback developer */
 unsigned get_wakeup_reason(void);
 int set_wakeup_timer(time_t t);
+int acrn_parse_intr_monitor(const char *opt);
 #endif