USB: Standardize inclusion protection and add where missing.

For the header files in include/linux/usb, add missing multiple
inclusion protection and standardize what's already there.  The
apparent standards:

  * macro name of __LINUX_USB_headerfile_H
  * inclusion protection placed after leading comment block
  * macro name added as a comment on the final #endif
  * any obvious trivial whitespace cleanup associated with the above

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index e007074..1db25d1 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -1,11 +1,13 @@
 /* USB OTG (On The Go) defines */
-
 /*
+ *
  * These APIs may be used between USB controllers.  USB device drivers
  * (for either host or peripheral roles) don't use these calls; they
  * continue to use just usb_device and usb_gadget.
  */
 
+#ifndef __LINUX_USB_OTG_H
+#define __LINUX_USB_OTG_H
 
 /* OTG defines lots of enumeration states before device reset */
 enum usb_otg_state {
@@ -129,3 +131,5 @@
 
 /* for OTG controller drivers (and maybe other stuff) */
 extern int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num);
+
+#endif /* __LINUX_USB_OTG_H */