redfish: use Redfish Delete All BMC Dumps instead

Signed-off-by: Joseph Liu <kwliu@nuvoton.com>
Signed-off-by: Tim Lee <timlee660101@gmail.com>
Change-Id: I29c6ba95e8b005543069fc2d541fadc1b895b3ea
diff --git a/oem/nuvoton/test_redfish_mcu_fw_update.robot b/oem/nuvoton/test_redfish_mcu_fw_update.robot
index 93a80ff..d1dcd3e 100644
--- a/oem/nuvoton/test_redfish_mcu_fw_update.robot
+++ b/oem/nuvoton/test_redfish_mcu_fw_update.robot
@@ -59,7 +59,7 @@
     Valid File Path  IMAGE_MCU_FILE_PATH_1
 
     Redfish.Login
-    Delete All BMC Dump
+    Redfish Delete All BMC Dumps
     Redfish Purge Event Log