Fix additional mis-spellings

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index dcb87b5..28d55dc 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -6344,7 +6344,7 @@
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "There is pending outgoing data" ) );
         return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
     }
-    /* Protocol must be DLTS, not TLS */
+    /* Protocol must be DTLS, not TLS */
     if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM )
     {
         MBEDTLS_SSL_DEBUG_MSG( 1, ( "Only DTLS is supported" ) );
diff --git a/tests/include/test/psa_exercise_key.h b/tests/include/test/psa_exercise_key.h
index e67f515..4306c1a 100644
--- a/tests/include/test/psa_exercise_key.h
+++ b/tests/include/test/psa_exercise_key.h
@@ -81,7 +81,7 @@
 #elif defined(MBEDTLS_SHA512_C)
 #define KNOWN_MBEDTLS_SUPPORTED_HASH_ALG PSA_ALG_SHA_512
 #else
-#undef KNOWN_MBEDLTS_SUPPORTED_HASH_ALG
+#undef KNOWN_MBEDTLS_SUPPORTED_HASH_ALG
 #endif
 
 /** \def KNOWN_SUPPORTED_BLOCK_CIPHER