sync backlight customization from flar2

Conflicts:
	drivers/video/msm/mdss/mdss_dsi_panel.c
remove the crap
fix build

Conflicts:
	boot.img
	sound/soc/codecs/wcd9320.c
msm: memutils: memcpy, memmove, copy_page optimization: Preload farther to take advantage of the memory bus, and assume
64-byte cache lines.  Unroll some pairs of ldm/stm as well, for
unexplainable reasons.