AppArmor: Fix RPi4b rules

Commit c5534c4b prevents AppArmor to start correctly:

Jan 26 20:53:31 apertis apparmor.systemd[577]: /sbin/apparmor_parser: Regex grouping error: Invalid number of items between {}
Jan 26 20:53:31 apertis apparmor.systemd[577]: /sbin/apparmor_parser: Unable to parse input line '/sys/device/platform/soc/fe[0-9]*.{mmc}/{**/,}uevent'
Jan 26 20:53:31 apertis apparmor.systemd[577]: ERROR processing regexs for profile /usr/sbin/ofonod, failed to load
Jan 26 20:53:31 apertis apparmor.systemd[384]: Error: At least one profile failed to load

https://phabricator.apertis.org/T8556

Signed-off-by: Frédéric Danis frederic.danis@collabora.com