change max screen off freq to 648000

Signed-off-by: cj360 <ayunker551@gmail.com>
msm-sleeper: save previous max freq, add ex_max_freq interface, loosen permissions

Signed-off-by: cj360 <ayunker551@gmail.com>

Conflicts:
	arch/arm/mach-msm/cpufreq.c
	arch/arm/mach-msm/msm-sleeper.c
actually fix build

Signed-off-by: cj360 <ayunker551@gmail.com>