With the default boot settings, the DDC drive strength is too weak,
set the driver-strengh to 4mA to avoid errors on the DDC line.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Reviewed-by: NMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: NKevin Hilman <khilman@baylibre.com>