arm: ls1021a: Enable CONFIG_OF_LIBFDT and CONFIG_FIT in defconfig

In defconfig, enable CONFIG_OF_LIBFDT to support booting DT linux
kernel and enable COFNIG_FIT to support FIT image.

Signed-off-by: Alison Wang <alison.wang@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/configs/ls1021aqds_nor_SECURE_BOOT_defconfig b/configs/ls1021aqds_nor_SECURE_BOOT_defconfig
index 243fcdd..30c2ca5 100644
--- a/configs/ls1021aqds_nor_SECURE_BOOT_defconfig
+++ b/configs/ls1021aqds_nor_SECURE_BOOT_defconfig
@@ -24,3 +24,5 @@
 CONFIG_SYS_NS16550=y
 CONFIG_RSA=y
 CONFIG_OF_LIBFDT=y
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y