uboot-phytec

rockchip: config: sync the ENV offset from rockchip legacy U-Boot

Using the ENV offset from rockchip legacy U-Boot for all SoCs,
the offset is 4MB-32KB

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>