surfaceflinger: Clean up use of QC extended API

gui: only support tertiary display if QTI_BSP is defined

Non-caf display HALs crap out with this

surfaceflinger: Correct QTI_BSP ifdef

* Should be #ifdef, not #if

REF: CRACKLING-938

sf: Fix blending mode for legacy BSP

 * After 0c5f3af3, glitches when blending is observed on
   A family devices. Modify ifdef to not include QCOM_BSP_LEGACY.

surfaceflinger: Fix the fix of the opaque check fix

 * Use the right define.

Change-Id: I45deaffc0d5efd8ffa643120b0dea3aab461d70f