usb: gadget: langwell: don't use the_controller when it's not needed
in most cases, we can fetch our structure by
calling dev_get_drvdata().
Signed-off-by: NFelipe Balbi <balbi@ti.com>
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in most cases, we can fetch our structure by
calling dev_get_drvdata().
Signed-off-by: NFelipe Balbi <balbi@ti.com>