[U-Boot] [U-Boot, 3/4] rockchip: add BOOT_LOADER support for boot mode

[Philipp Tomsich]

> Rockchip using rockusb for flash emmc via USB, people
> use 'reboot loader' in kernel and then want to get a rockusb
> device in bootloader for firmware update.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> ---
> 
>  arch/arm/mach-rockchip/rk3036-board.c | 4 ++++
>  arch/arm/mach-rockchip/rk322x-board.c | 4 ++++
>  arch/arm/mach-rockchip/rk3288-board.c | 4 ++++
>  3 files changed, 12 insertions(+)
> 

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