msm: mdss: hdmi: cleanup AVI infoframe register write

Define all the data associated with AVI infoframe. Write
the AVI infoframe data into registers in proper order.

Define and write into registers the AVI infoframe data
in a clean and readable format.

Change-Id: Id2bff5eb37aadcb4b5de86ff0dbba2a579ddf013
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>