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/axs101_defconfig b/configs/axs101_defconfig
index 0b15652..4e5f2e5 100644
--- a/configs/axs101_defconfig
+++ b/configs/axs101_defconfig
@@ -3,6 +3,7 @@
CONFIG_SYS_TEXT_BASE=0x81000000
CONFIG_SYS_CLK_FREQ=750000000
CONFIG_DEFAULT_DEVICE_TREE="axs101"
+CONFIG_ENV_IS_IN_FAT=y
CONFIG_BOOTDELAY=3
CONFIG_BOARD_EARLY_INIT_F=y
CONFIG_SYS_PROMPT="AXS# "