USB: export the new ch11.h file to userspce

This patch (as1374) cleans up a few loose ends in the
include/linux/usb/ch11.h header file and exports it to userspace.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Eric Lescouet <Eric.Lescouet@virtuallogix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/include/linux/usb/Kbuild b/include/linux/usb/Kbuild
index 29fd73b..51410e0 100644
--- a/include/linux/usb/Kbuild
+++ b/include/linux/usb/Kbuild
@@ -1,6 +1,7 @@
 header-y += audio.h
 header-y += cdc.h
 header-y += ch9.h
+header-y += ch11.h
 header-y += gadgetfs.h
 header-y += midi.h
 header-y += g_printer.h