drm/i915: Update some flush helpers to take request structures
drm/i915: Update some flush helpers to take request structures

Updated intel_emit_post_sync_nonzero_flush(), gen7_render_ring_cs_stall_wa() and
gen8_emit_pipe_control() to take requests instead of rings.

For: VIZ-5115
Signed-off-by: John Harrison <7ea9067f4c04953b0edff26c073edc55d90d3800@Intel.com>
Reviewed-by: Tomas Elf <de978db68760decfa49b19fad99f6d5453248432@intel.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs