drm/i915: Rename PIPE_CONTROL bit defines to be less terse.

"STALL_AT_SCOREBOARD" is much clearer than "STALL_EN" now that there are
several different kinds of stalls.  Also, "INSTRUCTION_CACHE_INVALIDATE"
is a lot easier to understand at a glance than the terse "IS_FLUSH."

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
[danvet: use INVALIDATE for ro cache flags for more consistency]
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Keith Packard <keithp@keithp.com>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 7f188c9..ca83635 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -468,7 +468,8 @@
 		return ret;
 
 	intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE |
-			PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH);
+			PIPE_CONTROL_WRITE_FLUSH |
+			PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE);
 	intel_ring_emit(ring, pc->gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
 	intel_ring_emit(ring, seqno);
 	intel_ring_emit(ring, 0);
@@ -484,7 +485,8 @@
 	scratch_addr += 128;
 	PIPE_CONTROL_FLUSH(ring, scratch_addr);
 	intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE |
-			PIPE_CONTROL_WC_FLUSH | PIPE_CONTROL_TC_FLUSH |
+			PIPE_CONTROL_WRITE_FLUSH |
+			PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE |
 			PIPE_CONTROL_NOTIFY);
 	intel_ring_emit(ring, pc->gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
 	intel_ring_emit(ring, seqno);