[U-Boot] [U-Boot, v4, 55/66] rockchip: rk3368: spl: add SPL support

[Philipp Tomsich]

> Adds SPL support for the RK3368 (assuming that our TPL stage has
> initialised DRAM and set up the memory firewall).
> 
> Signed-off-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> 
> Reviewed-by: Simon Glass <sjg at chromium.org>
> ---
> 
> Changes in v4: None
> Changes in v3: None
> Changes in v2:
> - reuses the support for configuring the boot order using the
>   u-boot,spl-boot-order property
> - drops the initialisation of the debug_uart
> - adds pinctrl-configuration for the preloader UART
> 
>  arch/arm/mach-rockchip/Makefile           |  2 +-
>  arch/arm/mach-rockchip/rk3368-board-spl.c | 98 +++++++++++++++++++++++++++++++
>  2 files changed, 99 insertions(+), 1 deletion(-)
>  create mode 100644 arch/arm/mach-rockchip/rk3368-board-spl.c
> 

Applied to u-boot-rockchip, thanks!