Initialize Makefile

 - add toolchain path of linaro toolchain
 - neon and arm optimization

Signed-off-by: Keff <funnykeff91@gmail.com>
arm/boot/compressed: make compatible with gcc 4.7+

fix warning
arch/arm/boot/compressed/head.S: Assembler messages:
arch/arm/boot/compressed/head.S:565: Warning: (null)
arch/arm/boot/compressed/head.S:676: Warning: (null)
arch/arm/boot/compressed/head.S:698: Warning: (null)
arch/arm/boot/compressed/head.S:722: Warning: (null)
arch/arm/boot/compressed/head.S:565: Warning: (null)

Signed-off-by: Keff <funnykeff91@gmail.com>
update toolchain path
cpufreq:ondemand: Add duration(max) for boosting

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