[POWERPC] 85xx: MPC8548CDS - Fix size of PCIe IO space

Andrew Klossner pointed out the IO space size was in violation of
the alignment requirements for windows on the 85xx.  The size should
have been 1M (to match u-boot).
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/mpc8548cds.dts

@@ -409,7 +409,7 @@
 		interrupts = <26 2>;
 		bus-range = <0 255>;
 		ranges = <0x2000000 0x0 0xa0000000 0xa0000000 0x0 0x20000000
-			  0x1000000 0x0 0x0 0xe3000000 0x0 0x8000000>;
+			  0x1000000 0x0 0x0 0xe3000000 0x0 0x100000>;
 		clock-frequency = <33333333>;
 		#interrupt-cells = <1>;
 		#size-cells = <2>;
@@ -428,7 +428,7 @@
 
 				  0x1000000 0x0 0x0
 				  0x1000000 0x0 0x0
-				  0x0 0x8000000>;
+				  0x0 0x100000>;
 		};
 	};
 };