pistachio: sort included header files

Place included header files in alphabetical order.

Change-Id: Ice23178d1f07e2cb0178efbc7ce487d54bf3f708
Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Reviewed-on: http://review.coreboot.org/10459
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/soc/imgtec/pistachio/ddr2_init.c

@@ -18,11 +18,11 @@
  * Foundation, Inc.
  */
 
-#include <stdint.h>
 #include <arch/cpu.h>
-#include <delay.h>
 #include <arch/io.h>
+#include <delay.h>
 #include <soc/ddr_init.h>
+#include <stdint.h>
 #include <timer.h>
 
 #define MAX_WAIT_MICROS			100000