hw/arm/virt: Clean up local variable shadowing

Fix:

  hw/arm/virt.c:821:22: error: declaration shadows a local variable [-Werror,-Wshadow]
            qemu_irq irq = qdev_get_gpio_in(vms->gic,
                     ^
  hw/arm/virt.c:803:13: note: previous declaration is here
        int irq;
            ^

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-ID: <20230904161235.84651-9-philmd@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

hw/arm/virt.c

@@ -801,7 +801,6 @@ static void create_gic(VirtMachineState *vms, MemoryRegion *mem)
     for (i = 0; i < smp_cpus; i++) {
         DeviceState *cpudev = DEVICE(qemu_get_cpu(i));
         int ppibase = NUM_IRQS + i * GIC_INTERNAL + GIC_NR_SGIS;
-        int irq;
         /* Mapping from the output timer irq lines from the CPU to the
          * GIC PPI inputs we use for the virt board.
          */
@@ -812,7 +811,7 @@ static void create_gic(VirtMachineState *vms, MemoryRegion *mem)
             [GTIMER_SEC]  = ARCH_TIMER_S_EL1_IRQ,
         };
 
-        for (irq = 0; irq < ARRAY_SIZE(timer_irq); irq++) {
+        for (unsigned irq = 0; irq < ARRAY_SIZE(timer_irq); irq++) {
             qdev_connect_gpio_out(cpudev, irq,
                                   qdev_get_gpio_in(vms->gic,
                                                    ppibase + timer_irq[irq]));