gfx: Fix for HDMI i2c operation not detected by some monitors.

gfx: Fix for HDMI i2c operation not detected by some monitors.

HDMI i2c operations are streamlined by adding appropriate sleeps
between the operations to complete properly and avoid subsequent
failures. HDMI i2c write operation to write 2 messages
(message and payload) is changed to writing 1 message instead
(message and payload combined). Some monitors don't handle 2
messages properly.

Issue: ANDROID-238
Signed-off-by: Amit Bhanagay <amit.bhanagay@intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>