Revert "OMAP3: hwc: Fix for rotation transition to render using SGX."

This reverts commit 729d97ad71b1a608381d3ebc96cc899dc729abd3.

Change-Id: I63e9da884c2e8c7a02d32f33dcfa550e943e3c96
hwc: Add vsync support

[steven@steven676.net: squash in
I25c4155959bc4fac3359000697a1c01b43726092 ("hwc: rollback API version")]

Change-Id: I28cb84197f230c987fd15170f5c4a647e5a1b145
hwc: Support VSYNC notification via sysfs

* Poll on FB0 sysfs for VSYNC events. This requires kernel support to
  call sysfs_notify instead of sending a uevent.

Based on Change-Id I48734d8ffdd59dc1de7064fa004af1332ceb7623 from the
qcom hwc

Change-Id: Iafd947420e441981556ff3d2f62007fa89e2cc1d
hwc: update api version to v1

Changes adapted from OMAP4XXX HWC

Change-Id: Ie795387132dbe4125272465892ec7a57987a9ee6
hwc: call omap3_hwc_reset_screen() only once

Change-Id: I95a8cc5ddd1708fa9b0261b4e82a9e66b80d1aec