MSM HotPlug: Allow to use 1 core boost. (disable the tweaks) to save PWR.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: mdss: fix race condition between shutdown thread and fb ioctl

Currently all entires into fb driver are synchronized with shutdown
context except fb ioctl context. fb ioctl is an asynchronous entry to
fb driver which can be called simultaneously from two different user
processes. Synchronize these fb ioctls and shutdown context to prevent
race condition.

Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>