[U-Boot] [U-Boot,1/3] rockchip: rk3399: detect boot mode

[Philipp Tomsich]

> U-Boot fastboot, kernel may reboot with parameter which require
> bootloader to get into different boot mode, detect it and enter
> proper mode.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> ---
> 
>  arch/arm/mach-rockchip/rk3399/Kconfig  |  1 +
>  arch/arm/mach-rockchip/rk3399/rk3399.c | 42 +++++++++++++++++++++++++++++++++-
>  2 files changed, 42 insertions(+), 1 deletion(-)
> 

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