usb: ohci-at91: use device managed clk retrieval
usb: ohci-at91: use device managed clk retrieval

Replace clk_get calls by devm_clk_get calls.

Signed-off-by: Boris BREZILLON <584ea62cadf5ee95d42aa81561c478d4b98fe58d@overkiz.com>
Acked-by: Nicolas Ferre <45b517be0e5ec6dc3a39715767c1d18e090d39b4@atmel.com>
Signed-off-by: Alan Stern <75ea6bb7bfc1186f92d26164de5f9268c9a45b59@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs