x86 hvm: Remove assertion that PIC IRQs are delivered only to VCPU0.

It's no longer true, if the guest reprograms IOAPIC pin0 for example.

Signed-off-by: Kouya Shimura <kouya@jp.fujitsu.com>

xen/arch/x86/hvm/irq.c

@@ -355,7 +355,6 @@ struct hvm_intack hvm_vcpu_ack_pending_irq(
             intack = hvm_intack_none;
         break;
     case hvm_intsrc_pic:
-        ASSERT(v->vcpu_id == 0);
         if ( (vector = vpic_ack_pending_irq(v)) == -1 )
             intack = hvm_intack_none;
         else