msm: kgsl: Increase minimum sampling time to 10msec and expose SYSFS

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>
tcp: add a sysctl to config the tcp_default_init_rwnd

The default initial rwnd is hardcoded to 10.

Now we allow it to be controlled via
  /proc/sys/net/ipv4/tcp_default_init_rwnd
which limits the values from 3 to 100

This is somewhat needed because ipv6 routes are
autoconfigured by the kernel.

See "An Argument for Increasing TCP's Initial Congestion Window"
in https://developers.google.com/speed/articles/tcp_initcwnd_paper.pdf

Change-Id: I386b2a9d62de0ebe05c1ebe1b4bd91b314af5c54
Signed-off-by: JP Abgrall <jpa@google.com>

Conflicts:
	include/net/tcp.h

Conflicts:
	include/net/tcp.h
ramdisk: Increase initial TCP window size

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>
msm: fb Set minimum brightness to the absolute minimum

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>
ramdisk: Enable deferrable KSM timer

* Saves battery.

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>
ramdisk: Tone down the frequencies

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>