FROMGIT: usb: dwc2: Disable clock gating feature on Rockchip SoCs

The DWC2 IP on the Rockchip SoCs doesn't support clock gating.
When a clock gating is enabled, system hangs.

Bug: 300024866
Change-Id: Ie9ea9da6bb49f0c19ed097bf01ff52845219098f
Signed-off-by: William Wu <william.wu@rock-chips.com>
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Link: https://lore.kernel.org/r/1703575199-23638-1-git-send-email-william.wu@rock-chips.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit ca2dc35e https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-next)