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.

Signed-off-by: Amperific <amperific@gmail.com>
Lib: string: use glibc version

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

Signed-off-by: Amperific <amperific@gmail.com>
ARM: msm: Voltage Control

Signed-off-by: Amperific <amperific@gmail.com>
ARM: msm: cpufreq: Sysfs Interface for voltage control

Signed-off-by: Amperific <amperific@gmail.com>
Revert "msm: krait: add CPU Voltage control."
And implement the new Voltage control.
This reverts commit 0acc00627248e4ec88b62f8222a1d891efc28887 and activates
the more efficient voltage control

Signed-off-by: Amperific <amperific@gmail.com>

Conflicts:
	arch/arm/mach-msm/acpuclock-krait.c
	drivers/cpufreq/cpufreq.c