Merge branch 'remove-intel-dri1'

Merge branch 'remove-intel-dri1'

* remove-intel-dri1:
  intel: intelScreenContext() is no longer used
  intel: Remove remaining dri2.enabled tests
  intel: Drop more cliprect bookkeeping
  intel: Remove struct intel_framebuffer
  intel: Remove client-side vblank code
  intel: Drop intelWindowMoved()
  intel: Drop batchbuffer cliprect_mode tracking
  intel: Drop DRI1 static regions
  intel: Use depth buffer from ctx.DrawBuffer in copypix_src_region()
  intel: Drop LOCK/UNLOCK_HARDWARE()
  intel: Drop DRI1 SwapBuffer implementation
  intel: Drop DRI1 CopySubBuffer implementation
  intel: Drop DRI1 support
  Push __driDriverExtensions out of dri_util.c and into the drivers
  Remove leftover __DRI{screen,drawable,context}Private references
  Check for libdrm_$chipset.pc when needed