In order to make some housekeeping in the directory, this patch renames
drivers to the timer-* format in order to unify their names.

There is no functional changes.
Acked-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: NVladimir Zapolskiy <vz@mleia.com>
Acked-by: NLiviu Dudau <liviu.dudau@arm.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>