arm64: dts: apple: Fix j45x model years

The Apple silicon iMac models were released in April 2021.
Signed-off-by: Janne Grunau <j@jannau.net>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>

arch/arm64/boot/dts/apple/t8103-j456.dts

@@ -14,7 +14,7 @@
 
 / {
 	compatible = "apple,j456", "apple,t8103", "apple,arm-platform";
-	model = "Apple iMac (24-inch, 4x USB-C, M1, 2020)";
+	model = "Apple iMac (24-inch, 4x USB-C, M1, 2021)";
 
 	aliases {
 		ethernet0 = &ethernet0;

arch/arm64/boot/dts/apple/t8103-j457.dts

@@ -14,7 +14,7 @@
 
 / {
 	compatible = "apple,j457", "apple,t8103", "apple,arm-platform";
-	model = "Apple iMac (24-inch, 2x USB-C, M1, 2020)";
+	model = "Apple iMac (24-inch, 2x USB-C, M1, 2021)";
 
 	aliases {
 		ethernet0 = &ethernet0;