[U-Boot] [U-Boot,v2,11/19] rockchip: Allow booting from SPI

[Philipp Tomsich]

> The u-boot,spl-boot-device property only allows MMC at present. Add SPI as
> well for boards that boot from SPI flash.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> 
> Changes in v2: None
> 
>  arch/arm/mach-rockchip/spl-boot-order.c | 3 +++
>  1 file changed, 3 insertions(+)
> 

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