Adjust presence of warning/link.

- the codegen migration document is already a migration document, so
doesn't need the extra warning about work in progress;
- the driver interface can use a link to the more practical guide too.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/docs/proposed/psa-driver-wrappers-codegen-migration-guide.md b/docs/proposed/psa-driver-wrappers-codegen-migration-guide.md
index 84c311c..67157e5 100644
--- a/docs/proposed/psa-driver-wrappers-codegen-migration-guide.md
+++ b/docs/proposed/psa-driver-wrappers-codegen-migration-guide.md
@@ -1,12 +1,11 @@
 Migrating to an auto generated psa_crypto_driver_wrappers.c file
 ================================================================
 
-**This is a specification of work in progress. The implementation is not yet merged into Mbed TLS.**
-For a description of the current state of drivers Mbed TLS, see our [PSA Cryptoprocessor driver development examples](../psa-driver-example-and-guide.html).
-
 This document describes how to migrate to the auto generated psa_crypto_driver_wrappers.c file.
 It is meant to give the library user migration guidelines while the Mbed TLS project tides over multiple minor revs of version 1.0, after which this will be merged into psa-driver-interface.md.
 
+For a practical guide with a description of the current state of drivers Mbed TLS, see our [PSA Cryptoprocessor driver development examples](../psa-driver-example-and-guide.html).
+
 ## Introduction
 
 The design of the Driver Wrappers code generation is based on the design proposal https://github.com/Mbed-TLS/mbedtls/pull/5067