create groups for Arm platforms and partner boards

Currently there are two l1 test groups which does non fvp/juno platform
boot tests, few of them are Arm reference platforms and few are partner
boards. Create two l2 groups one each for Arm platforms and partner
boards.

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: I279a1c7bbf577fca41bff3517eab680cd037f3a9
diff --git a/tf-a-gerrit-tforg-l2.yaml b/tf-a-gerrit-tforg-l2.yaml
index 88326b9..909091e 100644
--- a/tf-a-gerrit-tforg-l2.yaml
+++ b/tf-a-gerrit-tforg-l2.yaml
@@ -117,7 +117,7 @@
         - kill-phase-on: NEVER
           name: tf-a-ci-gateway
           predefined-parameters: |
-            TEST_GROUPS=tf-plat-tests tf-l1-boot-tests-plat
+            TEST_GROUPS=tf-l2-boot-tests-arm-plats tf-l2-boot-tests-partner-boards
             TF_REFSPEC=$GERRIT_REFSPEC
           property-file: env.param
     - multijob: