Switch to the new code style

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/include/alt-dummy/aes_alt.h b/tests/include/alt-dummy/aes_alt.h
index f226188..21d85f1 100644
--- a/tests/include/alt-dummy/aes_alt.h
+++ b/tests/include/alt-dummy/aes_alt.h
@@ -19,16 +19,14 @@
 #ifndef AES_ALT_H
 #define AES_ALT_H
 
-typedef struct mbedtls_aes_context
-{
+typedef struct mbedtls_aes_context {
     int dummy;
 }
 mbedtls_aes_context;
 
 #if defined(MBEDTLS_CIPHER_MODE_XTS)
 
-typedef struct mbedtls_aes_xts_context
-{
+typedef struct mbedtls_aes_xts_context {
     int dummy;
 } mbedtls_aes_xts_context;
 #endif