[U-Boot] [U-Boot, v4, 49/66] rockchip: Makefile: streamline SPL/TPL configuration

[Philipp Tomsich]

> Handling TPL and SPL in the Makefile for mach-rockchip was based on
> nested if checks and/or if-else-if paths.  This can be simplified and
> made more readable by using $(SPL_TPL_) and by introducing
> intermediate variables for the aggregation of SPL and TPL features.
> 
> 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: None
> 
>  arch/arm/mach-rockchip/Makefile | 46 +++++++++++++++++++++++++----------------
>  1 file changed, 28 insertions(+), 18 deletions(-)
> 

Applied to u-boot-rockchip, thanks!