Convert CONFIG_ENV_IS_IN_FAT to Kconfig
This converts the following to Kconfig:
CONFIG_ENV_IS_IN_FAT
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/sama5d36ek_cmp_mmc_defconfig b/configs/sama5d36ek_cmp_mmc_defconfig
index 1c5d85b..d99baad 100644
--- a/configs/sama5d36ek_cmp_mmc_defconfig
+++ b/configs/sama5d36ek_cmp_mmc_defconfig
@@ -6,6 +6,7 @@
CONFIG_DEBUG_UART=y
CONFIG_FIT=y
CONFIG_SYS_EXTRA_OPTIONS="SAMA5D3,SYS_USE_MMC"
+CONFIG_ENV_IS_IN_FAT=y
CONFIG_BOOTDELAY=3
# CONFIG_CONSOLE_MUX is not set
CONFIG_SYS_CONSOLE_IS_IN_ENV=y