tf-a-gerrit-tforg-l2.yaml: Add tf-l1-boot-tests-plat group

Add tf-l1-boot-tests-plat group to the basic boot tests job

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: I2b1ec766712b3f754cc8a5e5f043e84ebdf0b751
diff --git a/tf-a-gerrit-tforg-l2.yaml b/tf-a-gerrit-tforg-l2.yaml
index 64b90e9..efcdc9c 100644
--- a/tf-a-gerrit-tforg-l2.yaml
+++ b/tf-a-gerrit-tforg-l2.yaml
@@ -100,7 +100,7 @@
         - kill-phase-on: NEVER
           name: tf-a-ci-gateway
           predefined-parameters: |
-            TEST_GROUPS=tf-l1-boot-tests-aarch32 tf-l1-boot-tests-bl2_el3 tf-l1-boot-tests-cortex tf-l1-boot-tests-foundation tf-l1-boot-tests-gicv2 tf-l1-boot-tests-misc tf-plat-tests
+            TEST_GROUPS=tf-l1-boot-tests-aarch32 tf-l1-boot-tests-bl2_el3 tf-l1-boot-tests-cortex tf-l1-boot-tests-foundation tf-l1-boot-tests-gicv2 tf-l1-boot-tests-misc tf-plat-tests tf-l1-boot-tests-plat
             TF_REFSPEC=$GERRIT_REFSPEC
           property-file: env.param
     - multijob: