Revert "i965: Only emit 3DSTATE_DRAWING_RECTANGLE once on gen8+"

Revert "i965: Only emit 3DSTATE_DRAWING_RECTANGLE once on gen8+"

This reverts commit a2c1e48f15995a826dc759e064c2603882a37e0c.

On BDWGT3e and KBLGT3e systems, this commit regressed the following
tests:

  piglit.spec.ext_framebuffer_multisample.accuracy 2 stencil_resolve small depthstencil
  piglit.spec.ext_framebuffer_multisample.accuracy 4 stencil_resolve small depthstencil
  piglit.spec.ext_framebuffer_multisample.accuracy 6 stencil_resolve small depthstencil
  piglit.spec.ext_framebuffer_multisample.accuracy 8 stencil_resolve small depthstencil
  piglit.spec.ext_framebuffer_multisample.accuracy all_samples stencil_resolve small depthstencil