drm/i915: Move hangcheck code out from i915_irq.c

Create new file for hangcheck specific code, intel_hangcheck.c,
and move all related code in it.

v2: s/intel_engine_hangcheck/intel_engine (Chris)

No functional changes.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1478018583-5816-1-git-send-email-mika.kuoppala@intel.com

drivers/gpu/drm/i915/Makefile

@@ -47,6 +47,7 @@ i915-y += i915_cmd_parser.o \
 	  i915_trace_points.o \
 	  intel_breadcrumbs.o \
 	  intel_engine_cs.o \
+	  intel_hangcheck.o \
 	  intel_lrc.o \
 	  intel_mocs.o \
 	  intel_ringbuffer.o \

drivers/gpu/drm/i915/i915_drv.c

@@ -830,6 +830,7 @@ static int i915_driver_init_early(struct drm_i915_private *dev_priv,
 	intel_init_dpio(dev_priv);
 	intel_power_domains_init(dev_priv);
 	intel_irq_init(dev_priv);
+	intel_hangcheck_init(dev_priv);
 	intel_init_display_hooks(dev_priv);
 	intel_init_clock_gating_hooks(dev_priv);
 	intel_init_audio_hooks(dev_priv);

drivers/gpu/drm/i915/i915_drv.h

@@ -3009,6 +3009,7 @@ extern bool intel_has_gpu_reset(struct drm_i915_private *dev_priv);
 extern void i915_reset(struct drm_i915_private *dev_priv);
 extern int intel_guc_reset(struct drm_i915_private *dev_priv);
 extern void intel_engine_init_hangcheck(struct intel_engine_cs *engine);
+extern void intel_hangcheck_init(struct drm_i915_private *dev_priv);
 extern unsigned long i915_chipset_val(struct drm_i915_private *dev_priv);
 extern unsigned long i915_mch_val(struct drm_i915_private *dev_priv);
 extern unsigned long i915_gfx_val(struct drm_i915_private *dev_priv);

drivers/gpu/drm/i915/intel_engine_cs.c

@@ -220,11 +220,6 @@ void intel_engine_init_global_seqno(struct intel_engine_cs *engine, u32 seqno)
 	intel_engine_wakeup(engine);
 }
 
-void intel_engine_init_hangcheck(struct intel_engine_cs *engine)
-{
-	memset(&engine->hangcheck, 0, sizeof(engine->hangcheck));
-}
-
 static void intel_engine_init_timeline(struct intel_engine_cs *engine)
 {
 	engine->timeline = &engine->i915->gt.global_timeline.engine[engine->id];