video: msm: Migrate away from subsystem map APIs

This reverts commit 526068c5f872b805bfb6c4a66365d2483f2f1237.
This used the split domain names for display and rotator
subsystems compared to earlier version.

Change-Id: I385de26a0cfb5a976ead5f2687216fbab0104045
Signed-off-by: Ravishangar Kalyanam <rkalya@codeaurora.org>

Conflicts:
	drivers/video/msm/mdp4_overlay_dsi_video.c