hw/arm/virt: Set INTx/gsi mapping

Let's provide the GPEX host bridge with the INTx/gsi mapping. This is
needed for INTx/gsi routing.
Signed-off-by: NPranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: NTushar Jagad <tushar.jagad@linaro.org>
Signed-off-by: NEric Auger <eric.auger@redhat.com>
Reviewed-by: NAndrew Jones <drjones@redhat.com>
Tested-by: NFeng Kan <fkan@apm.com>
Message-id: 1505296004-6798-3-git-send-email-eric.auger@redhat.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/arm/virt.c

@@ -1057,6 +1057,7 @@ static void create_pcie(const VirtMachineState *vms, qemu_irq *pic)
 
     for (i = 0; i < GPEX_NUM_IRQS; i++) {
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, pic[irq + i]);
+        gpex_set_irq_num(GPEX_HOST(dev), i, irq + i);
     }
 
     pci = PCI_HOST_BRIDGE(dev);