ansible: 64bit kernel for raspbian

ansible/roles/raspbian/tasks/main.yml

@@ -24,3 +24,11 @@
     name: dphys-swapfile
     enabled: false
     state: stopped
+
+- name: Use 64bit kernel
+  lineinfile:
+    insertafter: '^\[pi4\]$'
+    regexp: '^arm_64bit='
+    line: "arm_64bit=1"
+    path: /boot/config.txt
+  when: raspbian64