sde: hwc_display: Set all the display attributes

- Set the HWC_DISPLAY_SECURE attribute in the HWC.
- All the physical connected displays are assumed to be secure by SF.
  Hence set this display attribute as true.
- This is added for backcompatibility.

Change-Id: I9e0ac4f3d923f990a5c81a3c36638bd62fdc83c0
1 file changed