msm_fb: display: Enable H/W vsync in msm7x27a

Enable tearing effect control in msm7x27a using gpio.

CRs-Fixed: 289024
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>

Conflicts:

	drivers/video/msm/mipi_dsi.c
	drivers/video/msm/mipi_renesas.c
	drivers/video/msm/mipi_renesas_cmd_fwvga_pt.c