MAINTAINERS: update the orphaned cpus-common.c file We forgot to update MAINTAINERS when this code was re-factored. Fixes: 267f685b8b Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200513173200.11830-5-alex.bennee@linaro.org>