powerpc/dts: Use a correct at24 compatible fallback in ac14xx

Using 'at24' as fallback is now deprecated - use the full
'atmel,<model>' string.
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/boot/dts/ac14xx.dts

@@ -176,12 +176,12 @@ i2c@1700 {
 			clock-frequency = <400000>;
 
 			at24@30 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x30>;
 			};
 
 			at24@31 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x31>;
 			};
 
@@ -191,42 +191,42 @@ temp@48 {
 			};
 
 			at24@50 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x50>;
 			};
 
 			at24@51 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x51>;
 			};
 
 			at24@52 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x52>;
 			};
 
 			at24@53 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x53>;
 			};
 
 			at24@54 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x54>;
 			};
 
 			at24@55 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x55>;
 			};
 
 			at24@56 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x56>;
 			};
 
 			at24@57 {
-				compatible = "at24,24c01";
+				compatible = "atmel,24c01";
 				reg = <0x57>;
 			};