sdm: Configure DP/DTV port based on the connection status.

1. Parse the connection status of each fb node on HDMI connection and
   configure DP/DTV port.
2. Enable HPD for all the pluggable displays.

Change-Id: I0e410f82660e30174068fd4e397771cea90d34b6
CRs-Fixed: 1055148
3 files changed