drm/gma500: add support for atom e6xx lpc lvds i2c

add gpio bitbanging i2c adapter on LPC device of atom e6xx
gpu chipset to access lvds EDID
tested on SECO QuadMo747-E6xx-EXTREME Qseven platform

Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Jan Safrata <jan.nikitenko@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --cc drivers/gpu/drm/gma500/Makefile
Simple merge

diff --cc drivers/gpu/drm/gma500/oaktrail_lvds.c
Simple merge

diff --cc drivers/gpu/drm/gma500/oaktrail_lvds_i2c.c
Simple merge

diff --cc drivers/gpu/drm/gma500/psb_drv.c
Simple merge

diff --cc drivers/gpu/drm/gma500/psb_drv.h
Simple merge

diff --cc drivers/gpu/drm/gma500/psb_intel_drv.h
Simple merge