msm: kgsl: Add sysfs node to track number of preemptions

This sysfs node will show the number of preemptions triggered
by kgsl. This comes handy when we want to check if preemptions
are happening or not.

Change-Id: I1ef924899d2f7abbc3fdeb976de17f96fa76b680
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>
3 files changed