Linewrap for the benefit of Uncrustify

The last line of programs/psa/key_ladder_demo.c is of the following
form:

 #endif /* Very long comment ... */

Uncrustify tries to reduce the length:

 #endif \
     /* Very long comment ... */

and causes a compiler error as there is a continuation line with no
actual code in it. Work around this by linewrapping the comment
in advance.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/programs/psa/key_ladder_demo.c b/programs/psa/key_ladder_demo.c
index 5d64349..bc1cd12 100644
--- a/programs/psa/key_ladder_demo.c
+++ b/programs/psa/key_ladder_demo.c
@@ -704,4 +704,6 @@
     usage( );
     return( EXIT_FAILURE );
 }
-#endif /* MBEDTLS_SHA256_C && MBEDTLS_MD_C && MBEDTLS_AES_C && MBEDTLS_CCM_C && MBEDTLS_PSA_CRYPTO_C && MBEDTLS_FS_IO */
+#endif /* MBEDTLS_SHA256_C && MBEDTLS_MD_C &&
+          MBEDTLS_AES_C && MBEDTLS_CCM_C &&
+          MBEDTLS_PSA_CRYPTO_C && MBEDTLS_FS_IO */