msm: mdss: Initial calibration mode implementation

Enable calibration mode to be set via framebuffer ioctl.

Change-Id: I50e7f652b23180553e1706975e7cbffce68ddf55
Signed-off-by: Carl Vanderlip <carlv@codeaurora.org>

Conflicts:
	drivers/video/msm/mdss/mdss_fb.c