Fix typo in comments
diff --git a/library/aria.c b/library/aria.c
index ad15ceb..25beafc 100644
--- a/library/aria.c
+++ b/library/aria.c
@@ -115,7 +115,7 @@
#endif /* arm */
#if defined(__GNUC__) && \
defined(__i386__) || defined(__amd64__) || defined( __x86_64__)
-/* I couldn't find an Intel equivalent of ret16, so two instructions */
+/* I couldn't find an Intel equivalent of rev16, so two instructions */
#define ARIA_P1(x) ARIA_P2( ARIA_P3( x ) )
#endif /* x86 gnuc */
#endif /* MBEDTLS_HAVE_ASM && GNUC */