arm64: dts: ti: k3-am65-iot2050-common: Rename rtc8564 nodename

Just use "rtc" as the nodename to better match with the bindings.
Signed-off-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20230607132043.3932726-4-nm@ti.comSigned-off-by: Vignesh Raghavendra <vigneshr@ti.com>

arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi

@@ -482,7 +482,7 @@ &main_i2c0 {
 	pinctrl-0 = <&main_i2c0_pins_default>;
 	clock-frequency = <400000>;
 
-	rtc: rtc8564@51 {
+	rtc: rtc@51 {
 		compatible = "nxp,pcf8563";
 		reg = <0x51>;
 	};