power: reset: at91-sama5d2_shdwc: Refactor wake-up source logging to use dev_info

Use dev_info() instead of pr_info() for more consistent
logging in the driver.

[root@sam9x75eb ~]$ dmesg | grep power
[    1.678542] at91-shdwc fffffe10.poweroff: Wake-Up source: WKUP pin

Signed-off-by: Mihai Sain <mihai.sain@microchip.com>
Link: https://lore.kernel.org/r/20250610124545.175492-3-mihai.sain@microchip.com


Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>