ARM: dts: AM4372: Reorder the rtc compatible string

Compared to da830-rtc compatibility am3352-rtc is more compatible to
the one in am437x. Hence adding the am3352-rtc compatible to cover the
entire feature set.

The ti,am4372-rtc has no Documentation and not used even in the driver
hence removing it.
Signed-off-by: NKeerthy <j-keerthy@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am4372.dtsi

@@ -330,7 +330,7 @@
 		};
 
 		rtc: rtc@44e3e000 {
-			compatible = "ti,am4372-rtc","ti,da830-rtc";
+			compatible = "ti,am3352-rtc", "ti,da830-rtc";
 			reg = <0x44e3e000 0x1000>;
 			interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH
 				      GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>;