ARM: at91: pm: use proper compatible for sama5d2's rtc

Use proper compatible strings for SAMA5D2's RTC IPs. This is necessary
for configuring wakeup sources for ULP1 PM mode.

Fixes: d7484f5c ("ARM: at91: pm: configure wakeup sources for ULP1 mode")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220523092421.317345-2-claudiu.beznea@microchip.com

arch/arm/mach-at91/pm.c

@@ -202,7 +202,7 @@ static const struct wakeup_source_info ws_info[] = {
 
 static const struct of_device_id sama5d2_ws_ids[] = {
 	{ .compatible = "atmel,sama5d2-gem",		.data = &ws_info[0] },
-	{ .compatible = "atmel,at91rm9200-rtc",		.data = &ws_info[1] },
+	{ .compatible = "atmel,sama5d2-rtc",		.data = &ws_info[1] },
 	{ .compatible = "atmel,sama5d3-udc",		.data = &ws_info[2] },
 	{ .compatible = "atmel,at91rm9200-ohci",	.data = &ws_info[2] },
 	{ .compatible = "usb-ohci",			.data = &ws_info[2] },