Revert "Added overclocking support"

This reverts commit 7dd5ece7ab360830644a18fa0ed962cf2a46ddfe.
Revert "Added VDD Level sysfs interface"

This reverts commit 99e91b9d1e5a799e820edc03ab4d8e5ff0b90cb7.
Added CPU Voltage Control (VDD sysfs interface)
Thanks to Doomlord
Reimplement OC support

Signed-off-by: Keff <funnykeff91@gmail.com>
Asynchronous I/O latency to a solid-state disk greatly increased

between the 2.6.32 and 3.0 kernels. By removing the plug from
do_io_submit(), we observed a 34% improvement in the I/O latency.

Unfortunately, at this level, we don't know if the request is to
a rotating disk or not.
Added Fast Random generator support (frandom)
Frandom is a Linux kernel random number generator, which is 10-50
times faster than what you get from Linux' built-in /dev/urandom.
And it uses very little (/dev/frandom) or none (/dev/erandom) of
the kernel's entropy pool, so it is very useful for applications
that require a handy source for lots of random data.
Added filesystem dynamic read-ahead
Thanks to Chad Gooldman
lib/memcopy: use glibc version

the kernel's memcpy and memmove is very inefficient. But the glibc version is
quite fast, in some cases it is 10 times faster than the kernel version. So I
introduce some memory copy macros and functions of the glibc to improve the
kernel version's performance.

The strategy of the memory functions is:
1. Copy bytes until the destination pointer is aligned.
2. Copy words in unrolled loops.  If the source and destination are not
   aligned in the same way, use word memory operations, but shift and merge
   two read words before writing.
3. Copy the few remaining bytes.
lib/string: use glibc version

the performance of memcpy and memmove of the general version is very
inefficient, this patch improved them.
Optimized ARM RWSEM algorithm

RWSEM implementation for ARM using atomic functions.
Heavily based on arch/sh/include/asm/rwsem.h
Added whiteback tweak during screen on/off (franco)

Signed-off-by: Keff <funnykeff91@gmail.com>
Fixes (感觉不错)

Signed-off-by: Keff <funnykeff91@gmail.com>