Add decoding empty buffer test calls for cipher modes that benefit from this
diff --git a/tests/suites/test_suite_cipher.des.data b/tests/suites/test_suite_cipher.des.data
index ba9020e..dbd6809 100644
--- a/tests/suites/test_suite_cipher.des.data
+++ b/tests/suites/test_suite_cipher.des.data
@@ -1,3 +1,15 @@
+DES CBC Decrypt empty buffer
+depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_CIPHER_PADDING_PKCS7
+dec_empty_buf:MBEDTLS_CIPHER_DES_CBC
+
+DES EDE CBC Decrypt empty buffer
+depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_CIPHER_PADDING_PKCS7
+dec_empty_buf:MBEDTLS_CIPHER_DES_EDE_CBC
+
+DES EDE3 CBC Decrypt empty buffer
+depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_CIPHER_PADDING_PKCS7
+dec_empty_buf:MBEDTLS_CIPHER_DES_EDE3_CBC
+
DES Encrypt and decrypt 0 bytes
depends_on:MBEDTLS_DES_C:MBEDTLS_CIPHER_MODE_CBC:MBEDTLS_CIPHER_PADDING_PKCS7
enc_dec_buf:MBEDTLS_CIPHER_DES_CBC:"DES-CBC":64:0:-1