powerpc: wii.dts: Expose the OTP on this platform

This can be used by the newly-added nintendo-otp nvmem module.
Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210801073822.12452-5-linkmauve@linkmauve.fr

arch/powerpc/boot/dts/wii.dts

@@ -219,12 +219,17 @@ control@d800100 {
 			/*
 			 * Both the address and length are wrong, according to
 			 * Wiibrew this should be <0x0d800000 0x400>, but it
-			 * requires refactoring the PIC1 and GPIO nodes before
-			 * changing that.
+			 * requires refactoring the PIC1, GPIO and OTP nodes
+			 * before changing that.
 			 */
 			reg = <0x0d800100 0xa0>;
 		};
 
+		otp@d8001ec {
+			compatible = "nintendo,hollywood-otp";
+			reg = <0x0d8001ec 0x8>;
+		};
+
 		disk@d806000 {
 			compatible = "nintendo,hollywood-di";
 			reg = <0x0d806000 0x40>;