drm: msm: dp: add support for CEC-tunneling-over-AUX channel

Register cec device and handle cec events through irq_hpd.

Change-Id: Id29479acd00385c2741aa688ef63079eeb7b9f1e
Signed-off-by: Venkata Prahlad Valluru <vvalluru@codeaurora.org>
3 files changed