ARM: dts: microchip: sama7d65: Add RTT timer to curiosity board

Add RTT timer with backup register for SAMA7D65_Curiosity board.

Signed-off-by: Ryan Wanner <[email protected]>
Link: https://lore.kernel.org/r/463581224a07bf122c6907d34a0c5c71b1cc73e1.1744666011.git.Ryan.Wanner@microchip.com
Signed-off-by: Claudiu Beznea <[email protected]>

Author: ryan-wanner

arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts

@@ -346,6 +346,10 @@
 	};
 };
 
+&rtt {
+	atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
+};
+
 &sdmmc1 {
 	bus-width = <4>;
 	pinctrl-names = "default";