[PATCH] hw: Use TYPE_PCI_BUS definition where appropriate

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

Use the proper QOM type definition instead of magic string.
This also helps during eventual refactor while using git-grep.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/arm/smmu-common.c     | 3 ++-
 hw/virtio/virtio-iommu.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c
index 54186f31cb..733c964778 100644
--- a/hw/arm/smmu-common.c
+++ b/hw/arm/smmu-common.c
@@ -535,7 +535,8 @@ static void smmu_base_reset_hold(Object *obj)
 
 static Property smmu_dev_properties[] = {
     DEFINE_PROP_UINT8("bus_num", SMMUState, bus_num, 0),
-    DEFINE_PROP_LINK("primary-bus", SMMUState, primary_bus, "PCI", PCIBus *),
+    DEFINE_PROP_LINK("primary-bus", SMMUState, primary_bus,
+                     TYPE_PCI_BUS, PCIBus *),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 23c470977e..1cd258135d 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -1366,7 +1366,8 @@ static const VMStateDescription vmstate_virtio_iommu = {
 };
 
 static Property virtio_iommu_properties[] = {
-    DEFINE_PROP_LINK("primary-bus", VirtIOIOMMU, primary_bus, "PCI", PCIBus *),
+    DEFINE_PROP_LINK("primary-bus", VirtIOIOMMU, primary_bus,
+                     TYPE_PCI_BUS, PCIBus *),
     DEFINE_PROP_BOOL("boot-bypass", VirtIOIOMMU, boot_bypass, true),
     DEFINE_PROP_END_OF_LIST(),
 };
-- 
2.38.1