clocksource/drivers/timer-atmel-pit: Rework Kconfig option

Allow building the PIT driver when COMPILE_TEST is enabled. Also remove its
default value so it can be disabled.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
1 file changed