ARM: dts: aspeed: Rainier 1S4U: Fix fan nodes

The 1S4U system populates fans 0, 1, 2, and 4. Update the dts to
reflect this.

Fixes: 7f03894a65 ("ARM: dts: aspeed: Add Rainier 1S4U machine")
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/aspeed-bmc-ibm-rainier-1s4u.dts

@@ -9,6 +9,6 @@
 };
 
 &max {
-	/delete-node/ fan4;
+	/delete-node/ fan3;
 	/delete-node/ fan5;
 };