TinyCrypt: Deprecate the library

Now that PSA is supported on Zephyr and the code base has changed to use
that library, TinyCrypt is been deprecate. Reasons for this change can be
found in #43712.

Signed-off-by: Flavio Ceolin <flavio.ceolin@gmail.com>

doc/releases/release-notes-4.1.rst

@@ -43,6 +43,12 @@ Deprecated in this release
   the same functionality in their application code by reconnecting to the peer when the
   :c:member:`bt_conn_cb.disconnected` callback is invoked.
 
+* Deprecated TinyCrypt library. The reasons for this are (:github:`43712`):
+
+  * The upstream version of this library is no longer maintained.
+  * Reducing the number of cryptographic libraries in Zephyr to reduce maintenance overhead.
+  * The PSA Crypto API is the recommended cryptographic library for Zephyr.
+
 Architectures
 *************
 

modules/Kconfig.tinycrypt

@@ -9,6 +9,7 @@ config ZEPHYR_TINYCRYPT_MODULE
 config TINYCRYPT
 	bool "TinyCrypt Support"
 	depends on ZEPHYR_TINYCRYPT_MODULE
+	select DEPRECATED
 	help
 	  This option enables the TinyCrypt cryptography library.