Revert "Switch CPU0/1 online instead of CPU2/3"

This modification will limit cpu from 4 to 2 core during bootup and will affect power on performance.
So revert this.

This reverts commit 3b4204ba.

Change-Id: I111210c73b31514aa41cac617be45f499561f6d9

arch/arm/boot/dts/msm8909w-lionfish/msm8909w-lionfish.dtsi

@@ -12,7 +12,7 @@
 
 / {
 	chosen {
-		bootargs="boot_cpus=0,1 sched_enable_hmp=0";
+		bootargs="sched_enable_hmp=0";
 	};
 };