drm/msm: add drm_connector as input to sde connector ops

This change adds drm_connector as one of the input parameter
to sde_connector_ops. sde_connector_ops needs drm_connector
input when interface drivers are working with more than one
stream, similar DP MST.

Change-Id: Ic8499482bacd901245ed7051cd8abb338781bc8c
Signed-off-by: Govinda Rajulu Chenna <gchenna@codeaurora.org>