Add archlinux (aarch64) support (#146)

* Add archlinux (aarch64) support

Signed-off-by: Assaf Sapir <meijin007@gmail.com>

roles/raspberrypi/tasks/prereq/Archlinux.yml

@@ -0,0 +1,14 @@
+---
+- name: Enable cgroup via boot commandline if not already enabled for Archlinux
+  lineinfile:
+    path: /boot/boot.txt
+    search_string: setenv bootargs console=ttyS1,115200 console=tty0 root=PARTUUID=${uuid} rw rootwait smsc95xx.macaddr="${usbethaddr}"
+    line: setenv bootargs console=ttyS1,115200 console=tty0 root=PARTUUID=${uuid} rw rootwait smsc95xx.macaddr="${usbethaddr}" cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory
+  register: kernel_cmdline_cgroup
+
+- name: Create
+  shell: ./mkscr
+  args:
+    chdir: /boot
+  notify: reboot
+  when: kernel_cmdline_cgroup.changed