hv: fix possible buffer overflow issues

- cpu_secondary_init() @cpu.c
 - ptirq_intx_pin_remap() @ assign.c
   etc.

Tracked-On: #1252
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/arch/x86/cpu.c

@@ -407,6 +407,9 @@ void init_cpu_pre(uint16_t pcpu_id)
 		early_init_lapic();
 
 		pcpu_id = get_cpu_id_from_lapic_id(get_cur_lapic_id());
+		if (pcpu_id >= CONFIG_MAX_PCPU_NUM) {
+			panic("Invalid pCPU ID!");
+		}
 	}
 
 	bitmap_set_nolock(pcpu_id, &pcpu_active_bitmap);