[CUSTOM][MACHINES] Multiple machine configurations for customer projects

  Previously, only a single configuration was supported per customer project.
  Some customers require separate setups for different machine types.
  This introduces multiple configurations, by setting the necessary variables.
  Currently, the supported machine types are limited to c57 and b98.

build-pipeline-yocto.yml.jinja2

@@ -234,6 +234,23 @@ release:
         {% set KERNEL_FILE = "Image" %}
         {% set AZURE_PATH = "raspberry/" + machine %}
       {% endif %}
+    {% else %}
+    {# ============== Custom porojects =================== #}
+      {% if "b68" in machine %}
+        {% set PROCESSOR = "intel" %}
+        {% set MACHINE = "seco-intel-apl" %}
+        {% set DEFCONFIG = "seco_" + CUSTOM + "_intel_apl_edgehog" %}
+        {% set UBOOT_FILE = "none" %}
+        {% set KERNEL_FILE = "none" %}
+        {% set BUILD_DIR = "build_" + CUSTOM + "_" + machine %}
+      {% elif "c57" in machine %}
+        {% set PROCESSOR = "imx8qxp" %}
+        {% set MACHINE = "seco-imx8qxp-c57" %}
+        {% set DEFCONFIG = "seco_" + CUSTOM + "_c57_edgehog" %}
+        {% set KERNEL_FILE = "Image" %}
+        {% set UBOOT_FILE = "imx-boot" %}
+        {% set BUILD_DIR = "build_" + CUSTOM + "_" + machine %}
+      {% endif %}
     {% endif %}
     {% for distro in DISTRO.split(' ')%}
       {% set ca_namespace = namespace(CUSTOM_ARTIFACTS="") %}