powerpc/microwatt: Fix model property in device tree

The standard property for the model name is called "model".

Signed-off-by: J. Neuschäfer <[email protected]>
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: neuschaefer

arch/powerpc/boot/dts/microwatt.dts

@@ -4,7 +4,7 @@
 / {
 	#size-cells = <0x02>;
 	#address-cells = <0x02>;
-	model-name = "microwatt";
+	model = "microwatt";
 	compatible = "microwatt-soc";
 
 	aliases {