uboot-phytec

MLK-17821-2 imx8: clock: Add cdns3 and usbotg clock enable and disable

Implemented the clock enable and disable interfaces for CDNS3 USB
driver and EHCI-MX6 USB otg driver.

Signed-off-by: Ye Li <ye.li@nxp.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
(cherry picked from commit 2f0dc4c503d8ac831fb809ec124e79712defae77)
(cherry picked from commit c7a808574b37557199bd2b17c963ec207854b801)