ARM: dts: aspeed: rainier: Switch PSUs to unknown version

Rainier can use either version of the IBM CFFPS, so don't set the
version in the devicetree so the driver can detect it automatically.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>

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

@@ -97,22 +97,22 @@ &i2c3 {
 	status = "okay";
 
 	power-supply@68 {
-		compatible = "ibm,cffps2";
+		compatible = "ibm,cffps";
 		reg = <0x68>;
 	};
 
 	power-supply@69 {
-		compatible = "ibm,cffps2";
+		compatible = "ibm,cffps";
 		reg = <0x69>;
 	};
 
 	power-supply@6a {
-		compatible = "ibm,cffps2";
+		compatible = "ibm,cffps";
 		reg = <0x6a>;
 	};
 
 	power-supply@6b {
-		compatible = "ibm,cffps2";
+		compatible = "ibm,cffps";
 		reg = <0x6b>;
 	};
 };