configs: rockchip: rk3036: Fix CONFIG_SPL_STACK define

The CONFIG_SPL_STACK for rk3036 is removed in below patch, need to add
it back.

Fixes: f113d7d3034 ("Convert CONFIG_SPL_STACK to Kconfig")
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2 files changed