[U-Boot] [U-Boot,V9,2/4] usb: rockchip: add rockusb command

[Philipp Tomsich]

> this patch add rockusb command. the usage is
> rockusb <USB_controller> <devtype> <dev[:part]>
> e.g. rockusb 0 mmc 0
> 
> Signed-off-by: Eddie Cai <eddie.cai.linux at gmail.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> 
> Changes in v9:                                                                  
> -none
> 
> Changes in v8:                                                                  
> -none
> 
> Changes in v7:
> -none
> 
> Changes in v6:
> -none
> 
> Changes in v5:
> -none
> 
> Changes in v4:
> -move USB_FUNCTION_ROCKUSB to drivers/usb/gadget/Kconfig
> -modify the dependence
> 
> Changes in v3:
> -fix comment from Simon and Lukasz
> -fix checkpactch error
> ---
>  cmd/Kconfig   |  9 ++++++++
>  cmd/Makefile  |  1 +
>  cmd/rockusb.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 84 insertions(+)
>  create mode 100644 cmd/rockusb.c
> 

Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>