pci: Clean up includes

Clean up includes so that osdep.h is included first and headers
which it implies are not included manually.

This commit was created with scripts/clean-includes.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1453832250-766-23-git-send-email-peter.maydell@linaro.org
diff --git a/hw/pci/pci_host.c b/hw/pci/pci_host.c
index 49f59a5..5eaa935 100644
--- a/hw/pci/pci_host.c
+++ b/hw/pci/pci_host.c
@@ -18,6 +18,7 @@
  * with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "qemu/osdep.h"
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_host.h"
 #include "hw/pci/pci_bus.h"