makefile: add more optimization options for future use
makefile: fixed typos
Makefile: some Linaro gcc 4.9 optimizations
makefile: Added graphite and a couple other optimizations
defconfig: enable voltage control (reverted from commit ba9a3189a9f577c6db492c8bb120732ba4630c51)
Voltage Control: generic voltage control for DTS based kernels

Signed-off-by: Paul Reioux <reioux@gmail.com> (reverted from commit eeedb62710d1faa3bf57c1b1593cd989f63d5fb6)