tf-a-gerrit-tforg-l1: Add explicit params SPM_REFSPEC, CI_REFSPEC, MBEDTLS_URL

These parameters vary between mainline vs LTS releases, and to have
consistent maintainable jobs, these parameters should be consistently
available.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I4649acf70dc10505d8b6a0653b5dba5077a1f2c8
diff --git a/tf-a-gerrit-tforg-l1.yaml b/tf-a-gerrit-tforg-l1.yaml
index 79b316c..8a2561f 100644
--- a/tf-a-gerrit-tforg-l1.yaml
+++ b/tf-a-gerrit-tforg-l1.yaml
@@ -46,6 +46,17 @@
             name: TFTF_GERRIT_REFSPEC
             default: '+refs/heads/master:refs/remotes/origin/master'
         - string:
+           name: SPM_REFSPEC
+           default: '+refs/heads/master:refs/remotes/origin/master'
+           description: |
+             SPM(Hafnium) refspec to use. The master branch is used by default.
+        - string:
+            name: CI_REFSPEC
+            default: '+refs/heads/master:refs/remotes/origin/master'
+        - string:
+            name: MBEDTLS_URL
+            default: 'https://github.com/Mbed-TLS/mbedtls/archive/mbedtls-3.4.1.tar.gz'
+        - string:
             name: SHARE_FOLDER
             default: '/srv/shared/${JOB_NAME}/${BUILD_NUMBER}'
             description: 'Folder containing shared repositories for downstream pipeline jobs'