[U-Boot] [U-Boot,v2] rockchip: update boot0 hook

[Philipp Tomsich]

> Rockchip SoCs only need boot0 hook at SPL, and the U-Boot proper do not
> need it.
> 
> The very beginning of U-Boot proper is different between armv7 and armv8:
> armv7 start with ARM_VECTORS while armv8 start with 'b reset'.
> 
> Here is the map of very beginning for all cases:
> armv7 SPL: TAG(overwrite 'b 1f')+'b reset' + ARM_VECTORS
> armv7 U-Boot: ARM_VECTORS
> armv8 SPL: TAG(overwrite 'b 1f')+'b reset' + Reserved_iram(rk3399)
> armv8 U-Boot: 'b reset'
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---
> 
> Changes in v2:
> - update commit message
> 
>  arch/arm/include/asm/arch-rockchip/boot0.h | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 

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