libs/libc: add license. [1/1]

PD#SWPL-69730

Problem:
add license

Solution:
add license

Verify:
ad401_a113l

Signed-off-by: yang.li <yang.li@amlogic.com>
Change-Id: I0d07384c442b4d5f3385df2c46ede6d0d2637837
diff --git a/Kconfig b/Kconfig
index 2085752..e3b7ead 100644
--- a/Kconfig
+++ b/Kconfig
@@ -1,2 +1,6 @@
+# Copyright (c) 2021-2022 Amlogic, Inc. All rights reserved.
+
+# SPDX-License-Identifier: MIT
+
 rsource "aml/Kconfig"
 rsource "newlib/Kconfig"