hw/realview.c: Remove duplicate #include line

Remove a duplicate #include of sysbus.h.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

hw/realview.c

@@ -17,7 +17,6 @@
 #include "sysemu.h"
 #include "boards.h"
 #include "bitbang_i2c.h"
-#include "sysbus.h"
 #include "blockdev.h"
 
 #define SMP_BOOT_ADDR 0xe0000000