ARM: dts: aspeed: rainier: Add UCD90320 power sequencer

Change Rainier device tree to use UCD90320 chip and only bind driver to
port which excepts PMBus commands.
Signed-off-by: Jim Wright <wrightj@linux.vnet.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>

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

@@ -352,18 +352,8 @@ eeprom@51 {
 &i2c8 {
 	status = "okay";
 
-	ucd90320@b {
-		compatible = "ti,ucd90160";
-		reg = <0x0b>;
-	};
-
-	ucd90320@c {
-		compatible = "ti,ucd90160";
-		reg = <0x0c>;
-	};
-
 	ucd90320@11 {
-		compatible = "ti,ucd90160";
+		compatible = "ti,ucd90320";
 		reg = <0x11>;
 	};