Convert CONFIG_ENV_IS_IN_SPI_FLASH to Kconfig
This converts the following to Kconfig:
CONFIG_ENV_IS_IN_SPI_FLASH
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/ap143_defconfig b/configs/ap143_defconfig
index 3d856e9..ca77e79 100644
--- a/configs/ap143_defconfig
+++ b/configs/ap143_defconfig
@@ -4,6 +4,7 @@
CONFIG_TARGET_AP143=y
CONFIG_DEFAULT_DEVICE_TREE="ap143"
CONFIG_DEBUG_UART=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
CONFIG_BOOTDELAY=3
CONFIG_DISPLAY_CPUINFO=y
CONFIG_BOARD_EARLY_INIT_F=y