Remove unneeded version.h includes (and add where needed) for drivers/usb/

It was pointed out by 'make versioncheck' that linux/version.h was not
always being included where needed and sometimes included needlessly
in drivers/usb/.
This patch fixes up the includes.

For the UVC gadget driver bits, this was ACK'ed by Laurent Pinchart.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/usb/gadget/uvc.h

@@ -56,6 +56,7 @@ struct uvc_event
 #include <linux/usb.h>	/* For usb_endpoint_* */
 #include <linux/usb/gadget.h>
 #include <linux/videodev2.h>
+#include <linux/version.h>
 #include <media/v4l2-fh.h>
 
 #include "uvc_queue.h"

drivers/usb/gadget/uvc_v4l2.c

@@ -16,7 +16,6 @@
 #include <linux/errno.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
-#include <linux/version.h>
 #include <linux/videodev2.h>
 #include <linux/vmalloc.h>
 #include <linux/wait.h>

drivers/usb/storage/realtek_cr.c

@@ -25,7 +25,6 @@
 #include <linux/kthread.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
-#include <linux/version.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>