mdss: display-port: add support for USB type-C Alt mode

This change is needed to support display port
over USB type-C port. Add usbpd changes to
enable display port using Alternate mode for
type-C port.

Add support to parse VDO messages and send dp_config
packets when HPD is high.

Change-Id: I3ea5d969a73e3418af23ba4d8b7374fb20d2889f
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>