uboot-imx

rockchip: rk3288: use aligned address for SPL_TEXT_BASE

After we use boot0 hook, we can use offset '000' instead of '004' as
SPL_TEXT_BASE.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
[Updated tag in commit summary:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>