Convert CONFIG_SPL_STACK to Kconfig
This converts the following to Kconfig:
CONFIG_SPL_STACK
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/orangepi_win_defconfig b/configs/orangepi_win_defconfig
index 9fce313..830cbba 100644
--- a/configs/orangepi_win_defconfig
+++ b/configs/orangepi_win_defconfig
@@ -7,6 +7,7 @@
CONFIG_MACPWR="PD14"
CONFIG_SPL_SPI_SUNXI=y
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SPL_STACK=0x54000
CONFIG_SYS_PBSIZE=1024
CONFIG_SPI_FLASH_WINBOND=y
CONFIG_PHY_REALTEK=y