[U-Boot] rockchip: rk322x: update MACRO for back-to-brom

[Philipp Tomsich]

> The MACRO has been update after:
> ee14d29 rockchip: back-to-bootrom: split BACK_TO_BOOTROM for TPL/SPL
> We need to update the C code for it.
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> ---
> 
>  arch/arm/mach-rockchip/rk322x-board-spl.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

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