arm64: zynqmp: Use atmel prefix instead of at

This changes was done in mainline and this patch is just following it.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/dts/zynqmp-zcu102-revA.dts b/arch/arm/dts/zynqmp-zcu102-revA.dts
index c04e37d..60d3f71 100644
--- a/arch/arm/dts/zynqmp-zcu102-revA.dts
+++ b/arch/arm/dts/zynqmp-zcu102-revA.dts
@@ -422,7 +422,7 @@
 			 * 768B - 1024B address 0x57
 			 */
 			eeprom: eeprom@54 { /* u23 */
-				compatible = "at,24c08";
+				compatible = "atmel,24c08";
 				reg = <0x54>;
 			};
 		};