acrn/vhm: change the default notification vector to 0xF3

Currently the SOS kernel will call hcall_set_callback_vector to config
the expected up-notification vector(0xF3) and then hypervisor uses the
passed vector to raise the interrupt to SOS when needed.
As sos kernel already switches to 0xF3 notification vector, the default 
notification vector can be changed from 0xF7 to 0xF3. In such case it still
can work well even when the SOS kernel doesn't reconfigure the notification
vector. 

Tracked-On: #2355 
Acked-by: Eddie Dong <eddie.dong@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>

hypervisor/common/hypercall.c

@@ -1118,7 +1118,7 @@ int32_t hcall_vm_intr_monitor(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
  * @brief set upcall notifier vector
  *
  * This is the API that helps to switch the notifer vecotr. If this API is
- * not called, the hypervisor will use the default notifier vector(0xF7)
+ * not called, the hypervisor will use the default notifier vector(0xF3)
  * to notify the SOS kernel.
  *
  * @param vm Pointer to VM data structure

hypervisor/common/io_request.c

@@ -7,7 +7,7 @@
 
 #define ACRN_DBG_IOREQUEST	6U
 
-static uint32_t acrn_vhm_vector = VECTOR_VIRT_IRQ_VHM;
+static uint32_t acrn_vhm_vector = VECTOR_HYPERVISOR_CALLBACK_VHM;
 
 static void fire_vhm_interrupt(void)
 {