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/iNet_D978_rev2_defconfig b/configs/iNet_D978_rev2_defconfig
index 339e9f6..664745c 100644
--- a/configs/iNet_D978_rev2_defconfig
+++ b/configs/iNet_D978_rev2_defconfig
@@ -17,6 +17,7 @@
CONFIG_VIDEO_LCD_BL_PWM="PH0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SPL_STACK=0x8000
CONFIG_SYS_PBSIZE=1024
CONFIG_AXP_DLDO1_VOLT=3300
# CONFIG_REQUIRE_SERIAL_CONSOLE is not set