Update notes for submitted changes

* hwc: allow building in Thumb mode on ARM
* hwc: use TARGET_SCREEN_WIDTH/TARGET_SCREEN_HEIGHT to set initial overlay size
* hwc: Fix check for presence of sysfs vsync_time file
* hwc: silence a compiler warning
* hwc: fix probable typo/thinko
* hwc: call omap3_hwc_reset_screen() only once
* hwc: update api version to v1
* hwc: Support VSYNC notification via sysfs
* hwc: Add vsync support
* Revert "OMAP3: hwc: Fix for rotation transition to render using SGX."