leds: pca9532: Change default blinking frequency to 1Hz

Default blinking period is set to 2s. This is too long to be handled by
the hardware (maximum is 1.69s).

Set the default blinking period to 1s to match what is done in the
other LED drivers.

Signed-off-by: Bastien Curutchet <bastien.curutchet@bootlin.com>
Link: https://lore.kernel.org/r/20240617143910.154546-5-bastien.curutchet@bootlin.com


Signed-off-by: Lee Jones <lee@kernel.org>