Revert "lib/string: use glibc version"

This reverts commit c46fc77331479a90a5ec8514dd4c57d73b344edf.
Revert "lib/memcopy: use glibc version"

This reverts commit 68fe91b7f5dd5bba0bcf68191f9e0be4a1efc219.
msm: rq_stats: Disable hotplug and stats by default

Userspace closed source mpdecision binary is nessecary for PowerHAL to work.
As it depends on rq_stats, let's at least disable hotplugging and stats
collection by default. /sys/devices/system/cpu/cpu0/rq-stats/hotplug_disable
is now writable, so hotplug can be reenabled.

Also, add some bits related to current cpu policy.

Conflicts:
	arch/arm/mach-msm/msm_rq_stats.c
msm: rq_stats: Calculate load based on current freq limit

We are not using rq_stats any more so this commit is just for the
sake of completeness.  Prior to this patch, load has been calculated
based on an initial value of policy.cpuinfo.max_freq. This value may
change for several reasons: userspace settings, thermal throttling
(hello hammerhead!) or extended frequency tables where the absolute
maximum level is often not used during regular operations. This
results in unreliable calculations. Consider current policy.max to
fix this behaviour.
initramfs: Leave mpdecision alone - hotplug depends on msm_hotplug