Enable HKDF in driver-only hashes test

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/tests/suites/test_suite_hkdf.function b/tests/suites/test_suite_hkdf.function
index 21e4439..ce8edcf 100644
--- a/tests/suites/test_suite_hkdf.function
+++ b/tests/suites/test_suite_hkdf.function
@@ -15,6 +15,8 @@
     int ret;
     unsigned char okm[128] = { '\0' };
 
+    MD_PSA_INIT();
+
     const mbedtls_md_info_t *md = mbedtls_md_info_from_type(md_alg);
     TEST_ASSERT(md != NULL);
 
@@ -26,6 +28,9 @@
 
     ASSERT_COMPARE(okm, expected_okm->len,
                    expected_okm->x, expected_okm->len);
+
+exit:
+    MD_PSA_DONE();
 }
 /* END_CASE */
 
@@ -39,6 +44,8 @@
     unsigned char *output_prk = NULL;
     size_t output_prk_len;
 
+    MD_PSA_INIT();
+
     const mbedtls_md_info_t *md = mbedtls_md_info_from_type(md_alg);
     TEST_ASSERT(md != NULL);
 
@@ -53,6 +60,7 @@
 
 exit:
     mbedtls_free(output_prk);
+    MD_PSA_DONE();
 }
 /* END_CASE */
 
@@ -66,6 +74,8 @@
     int ret;
     unsigned char *output_okm = NULL;
 
+    MD_PSA_INIT();
+
     const mbedtls_md_info_t *md = mbedtls_md_info_from_type(md_alg);
     TEST_ASSERT(md != NULL);
 
@@ -82,6 +92,7 @@
 
 exit:
     mbedtls_free(output_okm);
+    MD_PSA_DONE();
 }
 /* END_CASE */