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/Empire_electronix_m712_defconfig b/configs/Empire_electronix_m712_defconfig
index e2d8a21..6570b97 100644
--- a/configs/Empire_electronix_m712_defconfig
+++ b/configs/Empire_electronix_m712_defconfig
@@ -15,6 +15,7 @@
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"
CONFIG_VIDEO_LCD_BL_PWM="PB2"
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SPL_STACK=0x8000
CONFIG_SPL_I2C=y
CONFIG_SYS_PBSIZE=1024
CONFIG_SYS_I2C_MVTWSI=y