CI: only run pending-updates on master

This job takes a few minutes and isn't useful unless it's being ran for
master, or is being actively worked on.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

.gitlab-ci.yml

@@ -255,6 +255,11 @@ n1sdp:
 
 pending-updates:
   extends: .setup
+  # Only run this job for the default branch (master), or if forced with
+  # BUILD_FORCE_PENDING_UPDATES.
+  rules:
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+    - if: $BUILD_FORCE_PENDING_UPDATES != null
   artifacts:
     paths:
       - update-report

meta-arm-systemready/recipes-test/arm-systemready-acs/arm-systemready-ir-acs.bb

@@ -48,7 +48,7 @@ TEST_SUITES = "arm_systemready_ir_acs"
 PV = "2.0.0"
 PV_DATE = "23.03"
 FULL_PV = "v${PV_DATE}_${PV}"
-ARM_SYSTEMREADY_IR_ACS_BRANCH ?= "main"
+ARM_SYSTEMREADY_IR_ACS_BRANCH ?= "legacy_systemready"
 IMAGE_FILENAME = "ir-acs-live-image-generic-arm64-${PV}.wic"
 SRC_URI = " \
     https://github.com/ARM-software/arm-systemready/raw/${ARM_SYSTEMREADY_IR_ACS_BRANCH}/IR/prebuilt_images/${FULL_PV}/ir-acs-live-image-generic-arm64.wic.xz;name=acs-img;downloadfilename=${IMAGE_FILENAME}.xz \