tf-a-lts-patch-stack-watcher.yaml: can on/off function individually

Add switches to enable/disable the following functions
1. Patch auto submission
2. Allow-CI job auto submission

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: Ia1237cc0898f2bca17d84f13009cf8a75eb1209a
diff --git a/tf-a-lts-patch-stack-watcher.yaml b/tf-a-lts-patch-stack-watcher.yaml
index 350ea32..1372bc1 100644
--- a/tf-a-lts-patch-stack-watcher.yaml
+++ b/tf-a-lts-patch-stack-watcher.yaml
@@ -9,6 +9,16 @@
         will merge the patch
     disabled: false
     parameters:
+    - bool:
+        name: ENABLE_PATCH_AUTO_SUBMISSION
+        description: |
+          Enable patch auto submission function
+        default: true
+    - bool:
+        name: ENABLE_AUTO_ALLOW_CI_JOB
+        description: |
+          Enable auto submit Allow-CI job
+        default: true
     - string:
         name: ALLOW_CI_JOB
         description: |