target: msm8974: Add check for edp function for 8974 target

In the case of msm8974 liquid device, the default
interface type is edp, so setting is edp function
to true only in that case, as dsi is used in all
other msm8974 targets.

Change-Id: I3dd6c12dc90cabd1c8b6320061296f569e295a9d
1 file changed