Added base device tree source for audiomini

Jenkinsfile

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+pipeline
+{
+    agent none
+    stages
+    {
+        stage ('Ubuntu 20.04')
+        {
+            agent {label 'Ubuntu_20.04.1'}
+            stages 
+            {
+                stage('Check Component Library Repo') 
+                {
+                    parallel
+                    {
+                        stage('Build Base Device Tree')
+                        {
+                            when {
+                                anyOf {
+                                    changeset "dts/**/*"
+                                }
+                            }
+                            steps 
+                            {
+                                build job: 'Frost Build Base Device Tree'
+                            }
+                        }
+                    }
+                }
+                stage('Cleanup')
+                {
+                    steps
+                    {
+                        deleteDir()
+                        dir("${workspace}@tmp") {
+                            deleteDir()
+                        }
+                    }
+                } 
+            }
+        }
+    }
+}

dts/Jenkinsfile

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+pipeline
+{
+    agent none
+    stages
+    {
+        stage ('Ubuntu_20.04.1')
+        {
+            agent {label 'Ubuntu_20.04.1'}
+            stages 
+            {
+                stage('Build Base Device Tree Blob')
+                {
+                    steps
+                    {   
+                        dir("dts")
+                        {
+                            sh 'make'
+                        }
+                    }
+                }
+                stage('Archive DTB')
+                {
+                    steps
+                    {
+                        dir("dts")
+                        {
+                            archiveArtifacts artifacts: 'audiomini.dtb', fingerprint: true
+                        }
+                    }
+                }
+                stage('Cleanup')
+                {
+                    steps
+                    {
+                        deleteDir()
+                        dir("${workspace}@tmp") {
+                            deleteDir()
+                        }
+                    }
+                } 
+            }
+        }
+    }
+}

dts/Makefile

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+default: audiomini
+
+audiomini:
+	dtc -I dts -O dtb -o audiomini.dtb audiomini.dts
+clean:
+	rm -f audiomini.dtb