msm8960-common: Use retire fence from MDP driver

Change-Id: I289ced6c6b97ad966735eafcfee945a9e0ca671c
msm8960-common: remove NEW_ION_API define

* NEW_ION_API is the default now, this define is unnecessary.

Change-Id: I51c9d7211348c27fb72687058344cf8bc7ddb621