Fix docs for MBEDTLS_AESCE_C

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 73229ea..f881105 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -2247,7 +2247,7 @@
 /**
  * \def MBEDTLS_AESCE_C
  *
- * Enable AES cryptographic extension support on 64-bit Arm.
+ * Enable AES cryptographic extension support on Armv8.
  *
  * Module:  library/aesce.c
  * Caller:  library/aes.c