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_zero2_defconfig b/configs/orangepi_zero2_defconfig
index d9c89c8..6211754 100644
--- a/configs/orangepi_zero2_defconfig
+++ b/configs/orangepi_zero2_defconfig
@@ -11,6 +11,7 @@
CONFIG_R_I2C_ENABLE=y
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
CONFIG_SPL_MAX_SIZE=0xbfa0
+CONFIG_SPL_STACK=0x58000
CONFIG_SPL_I2C=y
CONFIG_SYS_PBSIZE=1024
CONFIG_SPL_SYS_I2C_LEGACY=y