lava_helper_configs: Adjusted device type

In staging.linaro.org the mps2plus device is tagged
as mps. This change updates the lava configuration
to reflect that.

Change-Id: I49c914412ea6f5d97ff8441828dc840486061ccb
Signed-off-by: Minos Galanakis <minos.galanakis@linaro.org>
diff --git a/lava_helper/lava_helper_configs.py b/lava_helper/lava_helper_configs.py
index a5cf8c1..23816e4 100644
--- a/lava_helper/lava_helper_configs.py
+++ b/lava_helper/lava_helper_configs.py
@@ -48,7 +48,7 @@
 tfm_mps2_sse_200 = {
     "templ": "template_tfm_mps2_sse_200.jinja2",
     "job_name": "mps2plus-arm-tfm",
-    "device_type": "mps2plus",
+    "device_type": "mps",
     "job_timeout": 120,
     "action_timeout": 90,
     "monitor_timeout": 90,