arm: 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: 1453832250-766-13-git-send-email-peter.maydell@linaro.org
diff --git a/hw/timer/pl031.c b/hw/timer/pl031.c
index 34d9b44..d99d18c 100644
--- a/hw/timer/pl031.c
+++ b/hw/timer/pl031.c
@@ -11,6 +11,7 @@
  * GNU GPL, version 2 or (at your option) any later version.
  */
 
+#include "qemu/osdep.h"
 #include "hw/sysbus.h"
 #include "qemu/timer.h"
 #include "sysemu/sysemu.h"