ARM: dts: at91: vinco: fix I2C warning bus unit address

w+arch/arm/dts/.at91-vinco.dtb.pre.tmp:131.18-134.7: Warning (i2c_bus_reg): /ahb/apb/i2c@f8024000/rtc@64: I2C bus unit address format error, expected "32"
Signed-off-by: NEugen Hristev <eugen.hristev@microchip.com>

arch/arm/dts/at91-vinco.dts

@@ -128,7 +128,7 @@
 			i2c2: i2c@f8024000 {
 				status = "okay";
 
-				rtc1: rtc@64 {
+				rtc1: rtc@32 {
 					compatible = "epson,rx8900";
 					reg = <0x32>;
 				};