ci: add seco-imx8mm-c61-Xgb machines to pipelines

After splitting, also ci need to build separate MACHINE variables.

Signed-off-by: Ettore Chimenti <ettore.chimenti@seco.com>

.oniro-ci/machines-and-flavours.yaml

@@ -42,10 +42,18 @@ linux-seco-intel-b68-extra:
   variables:
     CI_ONIRO_BITBAKE_TARGETS: oniro-image-extra-tests
 
-linux-seco-imx8mm-c61:
+linux-seco-imx8mm-c61-2gb:
   extends: .build-linux-matrix
   variables:
-    MACHINE: seco-imx8mm-c61
+    MACHINE: seco-imx8mm-c61-2gb
+    # This platform requires proprietary resources to boot.
+    # See build-generic.yaml for explanation of CI_ONIRO_BB_LOCAL_CONF_ variables.
+    CI_ONIRO_BB_LOCAL_CONF_ACCEPT_FSL_EULA: 1
+
+linux-seco-imx8mm-c61-4gb:
+  extends: .build-linux-matrix
+  variables:
+    MACHINE: seco-imx8mm-c61-4gb
     # This platform requires proprietary resources to boot.
     # See build-generic.yaml for explanation of CI_ONIRO_BB_LOCAL_CONF_ variables.
     CI_ONIRO_BB_LOCAL_CONF_ACCEPT_FSL_EULA: 1