powerpc/44x: Incorrect NOR offset in Warp DTS

FPGA offset in NOR flash was converted incorrectly when switching from
64M to 4M flash.
Signed-off-by: NSean MacLennan <smaclennan@pikatech.com>
Signed-off-by: NJosh Boyer <jwboyer@linux.vnet.ibm.com>

arch/powerpc/boot/dts/warp.dts

@@ -157,7 +157,7 @@
 					#size-cells = <1>;
 					partition@300000 {
 						label = "fpga";
-						reg = <0x0030000 0x00040000>;
+						reg = <0x0300000 0x00040000>;
 					};
 					partition@340000 {
 						label = "env";