pci: use pci_word_test_and_clear_mask() in pci_device_reset()

use pci_clear_bit_word() in pci_device_reset() where appropriate.
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/pci.c

@@ -139,9 +139,8 @@ static void pci_device_reset(PCIDevice *dev)
     dev->irq_state = 0;
     pci_update_irq_status(dev);
     /* Clear all writeable bits */
-    pci_set_word(dev->config + PCI_COMMAND,
-                 pci_get_word(dev->config + PCI_COMMAND) &
-                 ~pci_get_word(dev->wmask + PCI_COMMAND));
+    pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
+                                 pci_get_word(dev->wmask + PCI_COMMAND));
     dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
     dev->config[PCI_INTERRUPT_LINE] = 0x0;
     for (r = 0; r < PCI_NUM_REGIONS; ++r) {