usb: musb: remove duplicated actions

Removing unnecessary duplicated actions that we've got while merging:
Commit 19915e62

 ("Merge 4.1-rc7 into usb-next")

[ b-liu@ti.com: added 'Commit' in the commit message ]

Signed-off-by: Kirill Esipov <yesipov@gmail.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>