powerpc/86xx: Correct SOC bus-frequency in GE Fanuc SBC610 DTS

This patch corrects the bus-frequency value provided in the SBC610's dts.
Signed-off-by: NMartyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/gef_sbc610.dts

@@ -108,7 +108,7 @@
 		compatible = "simple-bus";
 		ranges = <0x0 0xfef00000 0x00100000>;
 		reg = <0xfef00000 0x100000>;	// CCSRBAR 1M
-		bus-frequency = <0>;
+		bus-frequency = <33333333>;
 
 		i2c1: i2c@3000 {
 			#address-cells = <1>;