driver: usb: drop legacy rockchip xhci driver

We have changed to use dwc3 generic driver for usb3.0 host, so the
legacy Rockchip's xHCI driver is not needed, and drop it.

Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
3 files changed