Merge at91sam926x_pit_common_init in at91sam926x_pit_dt_init as this is the
only initialization method now.
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>