video: tegra: dc: dont restore windows in unblank

During unblank, the original framebuffer should be the window 0.
This is broken so for the short term we will keep windows unchanged on unblank.

Bug 1299586
Bug 1358722

Change-Id: Ib16d901b9bc77d6ec9075a054c0b5e5c5d52cb55
Signed-off-by: Rakesh Iyer <riyer@nvidia.com>
Signed-off-by: Min-wuk Lee <mlee@nvidia.com>
Reviewed-on: http://git-master/r/248842
(cherry picked from commit 92d5cd55b603857daafb18828c83dc2cc6b1a527)
Reviewed-on: http://git-master/r/273765
(cherry picked from commit 45a40357fc3bcb870a3fd505f690130cf79d3008)
Reviewed-on: http://git-master/r/302769
Reviewed-by: Harry Hong <hhong@nvidia.com>
Tested-by: Harry Hong <hhong@nvidia.com>