USB: <linux/usb_ch9.h> becomes <linux/usb/ch9.h>

This moves <linux/usb_ch9.h> to <linux/usb/ch9.h> to reduce some of the
clutter of usb header files.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 157db77..683513e 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -11,6 +11,7 @@
 header-y += netfilter_bridge/
 header-y += netfilter_ipv4/
 header-y += netfilter_ipv6/
+header-y += usb/
 
 header-y += affs_hardblocks.h
 header-y += aio_abi.h
@@ -326,7 +327,6 @@
 unifdef-y += uinput.h
 unifdef-y += uio.h
 unifdef-y += unistd.h
-unifdef-y += usb_ch9.h
 unifdef-y += usbdevice_fs.h
 unifdef-y += user.h
 unifdef-y += utsname.h