lz4: add overrun checks to lz4_uncompress_unknownoutputsize()

Jan points out that I forgot to make the needed fixes to the
lz4_uncompress_unknownoutputsize() function to mirror the changes done
in lz4_decompress() with regards to potential pointer overflows.

The only in-kernel user of this function is the zram code, which only
takes data from a valid compressed buffer that it made itself, so it's
not a big issue.  But due to external kernel modules using this
function, it's better to be safe here.

Reported-by: Jan Beulich <JBeulich@suse.com>
Cc: "Don A. Bailey" <donb@securitymouse.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Max screen off frequency and shut down cores while screen is off

Signed-off-by: flar2 <asegaert@gmail.com>

Conflicts:

	arch/arm/mach-msm/Kconfig
Change msm-sleeper to use lcd-notifier

Signed-off-by: flar2 <asegaert@gmail.com>
Add sysfs entry for max screen off frequency

Signed-off-by: flar2 <asegaert@gmail.com>
Change default max screen off frequency to 1190400

Signed-off-by: flar2 <asegaert@gmail.com>
defconfig: enable MSM_SLEEPER