display: Disable use of copybit temporarily

 * HWC will optimize drawing with copybit when the device is
   rotated 90/270 degrees as MDP cannot rotate the UI (HWC_BLIT),
   however the version of C2D2 currently available does not support
   fence_sync. This causes tearing when scrolling lists (Play Store,
   etc).
 * Put an ifdef around copybit initialization so HWC uses GLES instead.
 * We can remove this when an updated driver is available.

Bug: QSDB-9
Change-Id: I0d046c89782c7a1ef0d780b78f787d49005c4695