[U-Boot] rockchip: enable rk322x sysreset driver

[Philipp Tomsich]

> The sysreset driver for rk322x is ready but not enabled,
> add it to Makefile to make sure it's enabled.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
> 
>  drivers/sysreset/Makefile | 1 +
>  1 file changed, 1 insertion(+)
> 

Applied to u-boot-rockchip/next, thanks!