Call overlay_set even if there are no change in params

* Call overlay_set even if there are no change
  in mdp_overlay params.
* Remove mPPChanged and mLkgo variables and associated
  functions.
* This is needed because there is no value add in
  avoiding set calls when there are no change in params.
  This also helps us in avoiding hal hacks where we
  need to force call overlay_set due to driver issues.

CRs-Fixed: 587392, 588193
Change-Id: Ib626acbdce93185ff037c9581d07bbe428f5f159
Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h""
Merge "Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h"""
Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h""
Merge "Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h"""
Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h""
Merge "Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h"""
display : change wormhole calculation for swap rect

In case of swap rect use case ,wormhole rect will
be same as  dirty rect (if has any blending)

Change-Id: Id2ee34d860207c440a033010460723fe964f7074
Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h""
Merge "Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h"""
Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h""
Merge "Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h"""
Merge "Call overlay_set even if there are no change in params"
Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h""
Merge "Merge "Merge "HWC copybit: Add conditional check for src/dst crop w and h"""
Merge "Merge "Call overlay_set even if there are no change in params""
hwc: Get the retire fence from the MDP driver

Get the retire fence separately instead of duplicating the
release fence.

Bug: 9319776
Change-Id: Iacb773c2d94f635e27a7b355d399cb2e36dac2a5
Merge "Merge "Merge "Call overlay_set even if there are no change in params"""
Merge "Merge "Call overlay_set even if there are no change in params""
Merge "Merge "Merge "Call overlay_set even if there are no change in params"""