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: NPatrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: NJan Safrata <jan.nikitenko@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>