Stack size has been introduced by commita69814c815("arm64: zynqmp: Set initrd_high to as high as possible") and commit085201c246("arm64: versal: Set initrd_high to as high as possible") to support setting up initrd_high as high as possible. The same change should happen for Zynq because the code is moved to xilinx common location. Signed-off-by: Michal Simek <michal.simek@xilinx.com>