[POWERPC] DTS cleanup

Removed the following cruft from .dts files:
* 32-bit in cpu node -- doesn't exist in any spec and not used by kernel
* removed built-in (chrp legacy)
* Removed #interrupt-cells in places they don't need to be set
* Fixed ranges on lite5200*
* Removed clock-frequency from i8259 pic node, not sure where this came from
* Removed big-endian from i8259 pic nodes, this was just bogus

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/mpc7448hpc2.dts

@@ -31,7 +31,6 @@
 			timebase-frequency = <0>;	// 33 MHz, from uboot
 			clock-frequency = <0>;		// From U-Boot
 			bus-frequency = <0>;		// From U-Boot
-			32-bit;
 		};
 	};
 
@@ -44,7 +43,6 @@
   	tsi108@c0000000 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		#interrupt-cells = <2>;
 		device_type = "tsi-bridge";
 		ranges = <00000000 c0000000 00010000>;
 		reg = <c0000000 00010000>;
@@ -128,7 +126,6 @@
 			#address-cells = <0>;
 			#interrupt-cells = <2>;
 			reg = <7400 400>;
-			built-in;
 			compatible = "chrp,open-pic";
 			device_type = "open-pic";
                        	big-endian;
@@ -180,7 +177,6 @@
 				device_type = "pic-router";
 				#address-cells = <0>;
 				#interrupt-cells = <2>;
-				built-in;
 				big-endian;
 				interrupts = <17 2>;
 				interrupt-parent = <&mpic>;