Refer to Armv8-A (not Armv8) in comments

Co-authored-by: Jerry Yu <jerry.h.yu@arm.com>
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/sha256.c b/library/sha256.c
index 726f5fb..a6d0a7a 100644
--- a/library/sha256.c
+++ b/library/sha256.c
@@ -180,7 +180,7 @@
 static jmp_buf return_from_sigill;
 
 /*
- * Armv8 SHA256 support detection via SIGILL
+ * Armv8-A SHA256 support detection via SIGILL
  */
 static void sigill_handler(int signal)
 {
@@ -432,7 +432,7 @@
 
 #if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
 /*
- * This function is for internal use only if we are building both C and Armv8
+ * This function is for internal use only if we are building both C and Armv8-A
  * versions, otherwise it is renamed to be the public mbedtls_internal_sha256_process()
  */
 static