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/aristainetos_defconfig b/configs/aristainetos_defconfig
index 0a8b38d..525aff4 100644
--- a/configs/aristainetos_defconfig
+++ b/configs/aristainetos_defconfig
@@ -4,6 +4,7 @@
CONFIG_VIDEO=y
CONFIG_FIT=y
CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/aristainetos/aristainetos.cfg,MX6DL"
+CONFIG_ENV_IS_IN_SPI_FLASH=y
CONFIG_BOOTDELAY=3
# CONFIG_CONSOLE_MUX is not set
CONFIG_SYS_CONSOLE_IS_IN_ENV=y