Add linux-modules-extra-raspi package for Ubuntu 22.x on Raspberry. (#50)

* Add task for linux-modules-extra-raspi

Ubuntu 22.x on Raspberry Pi needs the linux-modules-extra-raspi package
for the vxlans kernel module.

* Remove linux-modules-extra-reaspi package

Not sure we want to do this but including it in the PR anyway for discussion.

roles/raspberrypi/tasks/prereq/Ubuntu.yml

@@ -6,3 +6,7 @@
     regexp: '^((?!.*\bcgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory\b).*)$'
     line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
   notify: reboot
+
+- name: Install linux-modules-extra-raspi
+  apt: name=linux-modules-extra-raspi state=present
+  when: raspberry_pi