[POWERPC] 4xx: remove bogus "ranges" property in Bamboo EBC node

This removes a bogus empty "ranges" property in the EBC device node
of the Bamboo board device-tree.

The "ranges" property should be created by the wrapper code when it is
implemented.  Until then, remove the empty property since it incorrectly
implies that there is a 1:1 address mapping between the EBC and the OPB.

This also fixes a warning from newer DTCs.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

arch/powerpc/boot/dts/bamboo.dts

@@ -126,7 +126,6 @@ EBC0: ebc {
 				#address-cells = <2>;
 				#size-cells = <1>;
 				clock-frequency = <0>; /* Filled in by zImage */
-				ranges;
 				interrupts = <5 1>;
 				interrupt-parent = <&UIC1>;
 			};