linux (Generic): Add patch to partially revert waitboosting fix

packages/linux/patches/default/linux-999-drm_i915-partial-revert-of-waitboosting-fix.patch

@@ -0,0 +1,36 @@
+From 836bcce2ecdd9d6ea0650acc9da4f74239a8463b Mon Sep 17 00:00:00 2001
+From: MilhouseVH <milhouseVH.github@nmacleod.com>
+Date: Tue, 3 Jul 2018 06:17:27 +0100
+Subject: [PATCH] drm/i915: partial revert of
+ e9af4ea2b9e7e5d3caa6354be14de06b678ed0fa
+
+The original change leaves the GPU more or less permanently in low power mode
+with the GPU running at idle frequency and never boosting which may result in
+stutter in the Kodi GUI. Tested on Skylake NUC6i5SYH.
+---
+ drivers/gpu/drm/i915/i915_request.h | 9 +--------
+ 1 file changed, 1 insertion(+), 8 deletions(-)
+
+diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
+index eddbd424..3f2895a 100644
+--- a/drivers/gpu/drm/i915/i915_request.h
++++ b/drivers/gpu/drm/i915/i915_request.h
+@@ -298,14 +298,7 @@ static inline bool i915_request_completed(const struct i915_request *rq)
+ 
+ static inline bool i915_request_started(const struct i915_request *rq)
+ {
+-	u32 seqno;
+-
+-	seqno = i915_request_global_seqno(rq);
+-	if (!seqno)
+-		return false;
+-
+-	return i915_seqno_passed(intel_engine_get_seqno(rq->engine),
+-				 seqno - 1);
++	return false;
+ }
+ 
+ static inline bool i915_sched_node_signaled(const struct i915_sched_node *node)
+-- 
+2.14.1
+