benchmark: improve code readability

Signed-off-by: Yanray Wang <yanray.wang@arm.com>
diff --git a/programs/test/benchmark.c b/programs/test/benchmark.c
index 06b739a..d8237f5 100644
--- a/programs/test/benchmark.c
+++ b/programs/test/benchmark.c
@@ -679,6 +679,7 @@
 #if defined(MBEDTLS_CIPHER_MODE_CBC)
     if (todo.des3) {
         mbedtls_des3_context des3;
+
         mbedtls_des3_init(&des3);
         if (mbedtls_des3_set3key_enc(&des3, tmp) != 0) {
             mbedtls_exit(1);
@@ -690,6 +691,7 @@
 
     if (todo.des) {
         mbedtls_des_context des;
+
         mbedtls_des_init(&des);
         if (mbedtls_des_setkey_enc(&des, tmp) != 0) {
             mbedtls_exit(1);
@@ -722,6 +724,7 @@
     if (todo.aes_cbc) {
         int keysize;
         mbedtls_aes_context aes;
+
         mbedtls_aes_init(&aes);
         for (keysize = 128; keysize <= 256; keysize += 64) {
             mbedtls_snprintf(title, sizeof(title), "AES-CBC-%d", keysize);
@@ -741,6 +744,7 @@
         int keysize;
         size_t iv_off = 0;
         mbedtls_aes_context aes;
+
         mbedtls_aes_init(&aes);
         for (keysize = 128; keysize <= 256; keysize += 64) {
             mbedtls_snprintf(title, sizeof(title), "AES-CFB128-%d", keysize);
@@ -758,6 +762,7 @@
     if (todo.aes_cfb8) {
         int keysize;
         mbedtls_aes_context aes;
+
         mbedtls_aes_init(&aes);
         for (keysize = 128; keysize <= 256; keysize += 64) {
             mbedtls_snprintf(title, sizeof(title), "AES-CFB8-%d", keysize);
@@ -889,6 +894,7 @@
     if (todo.aria) {
         int keysize;
         mbedtls_aria_context aria;
+
         mbedtls_aria_init(&aria);
         for (keysize = 128; keysize <= 256; keysize += 64) {
             mbedtls_snprintf(title, sizeof(title), "ARIA-CBC-%d", keysize);
@@ -909,6 +915,7 @@
     if (todo.camellia) {
         int keysize;
         mbedtls_camellia_context camellia;
+
         mbedtls_camellia_init(&camellia);
         for (keysize = 128; keysize <= 256; keysize += 64) {
             mbedtls_snprintf(title, sizeof(title), "CAMELLIA-CBC-%d", keysize);
@@ -1015,6 +1022,7 @@
     if (todo.rsa) {
         int keysize;
         mbedtls_rsa_context rsa;
+
         for (keysize = 2048; keysize <= 4096; keysize *= 2) {
             mbedtls_snprintf(title, sizeof(title), "RSA-%d", keysize);
 
@@ -1057,6 +1065,7 @@
         mbedtls_dhm_context dhm;
         size_t olen;
         size_t n;
+
         for (i = 0; (size_t) i < sizeof(dhm_sizes) / sizeof(dhm_sizes[0]); i++) {
             mbedtls_dhm_init(&dhm);
 
@@ -1170,6 +1179,7 @@
 
         if (curve_list == (const mbedtls_ecp_curve_info *) &single_curve) {
             mbedtls_ecp_group grp;
+
             mbedtls_ecp_group_init(&grp);
             if (mbedtls_ecp_group_load(&grp, curve_list->grp_id) != 0) {
                 mbedtls_exit(1);