usb: host: xhci-plat: sort the headers in alphabetic order

Sorting the headers in alphabetic order will help to reduce the conflict
when adding new headers later.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-plat.c

@@ -11,11 +11,11 @@
  * version 2 as published by the Free Software Foundation.
  */
 
-#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
 #include <linux/module.h>
-#include <linux/slab.h>
 #include <linux/of.h>
-#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
 
 #include "xhci.h"