hwc: support vsync notification via sysfs

Change-Id: Ie2172b5fb2e8595136f6ccb28abd9f8ce89a526f
hwc: fix timing issue with vsync sysfs loop

Change-Id: I6e0307e0fd5ea84748ddb580062b21f697512603
hwc: Add support for FB scaling and cloning

Patch contains following features
1)Large frame buffer support:
     Transformation matrix for LCD and HDMI added
     to ensure correct composition and renderring
     of all UI layers
     Added support for overlay distrubution based
     on FB size and target display
2)Default HDMI display support
     Support for default HDMI display selection.
     Added HDMI best mode selection on HPD

Rebased from p-ics-mr1:
96ad001 hwc: Add support for FB scaling and cloning

Change-Id: Ia6f06d5e149656c4d79ac2d3983211a253bb3969
Signed-off-by: Lajos Molnar <molnar@ti.com>
Signed-off-by: Muralidhar Dixit <murali.dixit@ti.com>
Signed-off-by: Dandawate Saket <dsaket@ti.com>
hwc: Support HDMI as primary display

This patch disables mirroring/docking logic when HDMI display
is used as primary instead of LCD panel.

Based on patch from Mark Tyler.

Rebased from p-ics-mr1:
9dd8ccd Support HDMI as primary display

Change-Id: Idd239a562bfc486e128b268fa31ced53412bba3a
Signed-off-by: Mykola Ostrovskyy <mykola@ti.com>
Signed-off-by: Muralidhar Dixit <murali.dixit@ti.com>
Signed-off-by: Tony Lofthouse <a0741364@ti.com>