mdss: Notify userspace of changes to blank status

Allow userspace to poll on the blank event to avoid triggering
unnecessary updates, such as when shutting down the device.

Change-Id: Ic6897e70c3b79fcaa8beaee046ce79a6dd368d0c
CRs-Fixed: 627814
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
mdss: Add newline to VSYNC timestamp

This makes sure that the userspace correctly interprets the end
of the vsync timestamp.

Change-Id: I256d5943dcb3cd6a116b0c2b1abbce4c5c4b0ea2
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>
msm: kgsl: Report correct GPU frequency in sysfs

Change-Id: Id881d207002f964f30f7dfa870e8563cffc05864
msm: kgsl: Export device state to devfreq

Change-Id: Ib0ce16bcd0eddeb5a75cf8dbcdab89974967313b
PM: devfreq: Fixup device transition and usage statistics

Ignore bogus data during slumber in transition and usage stats that
rendered the output basically useless. Also fix the reported GPU
frequency.

Change-Id: I09767d907636184619c2f60432dc44c8b354278c