Tidy up ARMCE terminology

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/aesce.c b/library/aesce.c
index acfac23..84a804a 100644
--- a/library/aesce.c
+++ b/library/aesce.c
@@ -1,5 +1,5 @@
 /*
- *  Arm64 crypto extension support functions
+ *  Armv8-A Cryptographic Extension support functions for Aarch64
  *
  *  Copyright The Mbed TLS Contributors
  *  SPDX-License-Identifier: Apache-2.0
diff --git a/library/aesce.h b/library/aesce.h
index da42446..4e44a68 100644
--- a/library/aesce.h
+++ b/library/aesce.h
@@ -1,8 +1,8 @@
 /**
  * \file aesce.h
  *
- * \brief AES-CE for hardware AES acceleration on ARMv8 processors with crypto
- *        extension.
+ * \brief Support hardware AES acceleration on Armv8-A processors with
+ *        the Armv8-A Cryptographic Extension in AArch64 execution state.
  *
  * \warning These functions are only for internal use by other library
  *          functions; you must not call them directly.