msm_fb: Make buffers aligned to 4K page boundary

This change makes the frame buffers aligned to the page
boundary. Improves GPU performance since accessing the
frame buffer from page boundary is faster.

Change-Id: I17879437dd7cbb9a1758d82321c6e68dbd88b9e0
CRs-Fixed: 325134
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>

Conflicts:
	drivers/video/msm/mdp4_overlay_atv.c
	drivers/video/msm/mdp4_overlay_dsi_video.c
	drivers/video/msm/mdp4_overlay_lcdc.c
	drivers/video/msm/mdp_dma.c
	drivers/video/msm/mdp_dma_dsi_video.c
	drivers/video/msm/mdp_dma_lcdc.c
	drivers/video/msm/mdp_dma_tv.c
	drivers/video/msm/msm_fb.c

Conflicts:
	drivers/video/msm/mdp4_overlay_dsi_video.c
	drivers/video/msm/mdp4_overlay_lcdc.c
	drivers/video/msm/msm_fb.c
msm_fb: Make buffers aligned to 4K page boundary
	modified:   drivers/video/msm/mdp4_overlay_atv.c
	modified:   drivers/video/msm/mdp4_overlay_dsi_video.c
	modified:   drivers/video/msm/mdp4_overlay_lcdc.c
	modified:   drivers/video/msm/mdp_dma.c
	modified:   drivers/video/msm/mdp_dma_dsi_video.c
	modified:   drivers/video/msm/mdp_dma_lcdc.c
	modified:   drivers/video/msm/mdp_dma_tv.c
	modified:   drivers/video/msm/msm_fb.c