USB: gadget: Implement remote wakeup device nodes in ci13xxx_udc

Leftovers that add the wakeup device node that didn't make it into
upstream.

Change-Id: Id9b80baa5d346ff5f3dc70b50c40b027b63d8695
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Anji jonnala <anjir@codeaurora.org>