Handle both new and old cmdline.txt locations in Raspbian (#362)

Signed-off-by: Derek Nola <derek.nola@suse.com>

roles/raspberrypi/tasks/prereq/Raspbian.yml

@@ -1,7 +1,12 @@
 ---
+- name: Check if /boot/firmware/cmdline.txt exists
+  ansible.builtin.stat:
+    path: /boot/firmware/cmdline.txt
+  register: boot_firmware_cmdline_txt
+
 - name: Enable cgroup via boot commandline if not already enabled
   ansible.builtin.replace:
-    path: /boot/cmdline.txt
+    path: "{{ (boot_firmware_cmdline_txt.stat.exists) | ternary('/boot/firmware/cmdline.txt', '/boot/cmdline.txt') }}"
     regexp: '^([\w](?!.*\b{{ cgroup_item }}\b).*)$'
     replace: '\1 {{ cgroup_item }}'
   with_items: