hwc/overlay: Get rot dest dimensions instead of manipulating source

Currently for Mdss rotator we manipulate the layer buffer dimensions
to be equal to what rotator's destination dimensions would be, so that
these could be fed to MDP. Instead, this patch introduces APIs in
rotator so that hwc can directly query destination crop, width, height,
format from rotator.

This also simplifies the updateSource() and configRotator() helpers.

Change-Id: I501d998f2e0574683c764af9422742b2426ba0c7
Revert "display: Revert some problematic changes for now."

This reverts commit 231f87b24f702d475365ab37becc1d4903218ca9.

Change-Id: I13fbac5299e6ee50d4f6924ca10ac7c136da288a
hwc: Source Split layers always if indicated by driver

Source Split layers always if the driver indicates so by setting
the src_split_always in the capabilities sysfs node.
This is applicable to layers whose width > mixer's width, since
MDP clk rate is dependent on max(mixer_width, layer_width).

This feature can be enabled if the panel height is more than a
certain empirically derived value. Splitting always in those
cases can help with a lower voltage.

Change-Id: If9b33f11ca4132eb77416c26819f7473c65d3b08
hwc: Add display ROI in HWC dumpsys

Add ROI generated for each display in their dumpsys data.

Change-Id: I41fb79af9d42abc11ff147d18a600fd4ad60ab6c
hwc: modifying logic in adjust FB Z-order for 4k2kYUVSplit

Use complete layer list details instead of depending on only
4k YUV layer indices.

Change-Id: I28deee47b8330a4b3c56bef48e333ce6ead8bf25
hwc: Consider FLIP flags for partial update.

FLIP flags need to be considered while calculating srcCrop and
displayFrame even when a layer is updated partially on dual DSI
panels.

Change-Id: I097b3335e66566d6639848bc8f8382bfeabb7f54
overlay: Remove obsolete code from pipe config path

Remove obsolete / unused code from pipe config path like pipe crop
modification for rotator downscale, 3D, pipestate.

Change-Id: I34ec80dce8736f65069794f21fbd56922304cb8b
hwc: Fix klockwork errors

Resolving klockwork errors to avoid memory leaks,
improper assignments in liboverlay.

Change-Id: I82ac6ae782c7b783e89999b832bbd1d361376b9f
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_hardware_qcom_display-caf-new into cm-11.0