drm/msm/sde: introduce sde_intf_te feature flag for sde intf blk

MDSS 4.0.0 has tear-effect configuration logic in ping-pong module
where it is moved to interface module in MDSS 5.0.0. Tear-effect
configuration ops are present in both ping-pong and interface module.
The enablement of tear-effect configuration ops are controlled using
the feature flag that is enabled based on MDSS version.

This change introduces a new feature flag, sde_intf_te, for interface
module. This new flag  is used to enable tear-effect configuration
logic for interface module in future implementations.

Change-Id: I0da32b77c56cab85c83b2314413504b8f7c2ee09
Signed-off-by: Govinda Rajulu Chenna <gchenna@codeaurora.org>