hwc: Enable sync-pt for rotator on B-family

Enable sync-pt for rotator on B-family. The already existing
MSMFB_BUF_SYNC ioctl is used, with an extra member for session_id
from rotator.

Change-Id: Ib0ef6b1bc5cf1e6437090a217d7f731a3440f84b
3 files changed