msm: mdss: update polarity based on HDMI resolution

Set horizontal and vertical polarities based on the
HDMI resolution and use these polarities when setting up
the MDP timing generator.

CRs-Fixed: 2016373
Change-Id: Ifaf4d72a25e512ecccf13f479a77c8e860978082
Signed-off-by: Casey Piper <cpiper@codeaurora.org>
Signed-off-by: Krishna Srinivas <krisrini@codeaurora.org>
Signed-off-by: Yuchao Ma <yuchaom@codeaurora.org>