drm/i915/pmu: Prefer drm_WARN_ON over WARN_ON

struct drm_device specific drm_WARN* macros include device information
in the backtrace, so we know what device the warnings originate from.

Prefer drm_WARN_ON over WARN_ON.
Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200504181600.18503-8-pankaj.laxminarayan.bharadiya@intel.com

drivers/gpu/drm/i915/i915_pmu.c

@@ -441,7 +441,11 @@ static u64 count_interrupts(struct drm_i915_private *i915)
 
 static void i915_pmu_event_destroy(struct perf_event *event)
 {
-	WARN_ON(event->parent);
+	struct drm_i915_private *i915 =
+		container_of(event->pmu, typeof(*i915), pmu.base);
+
+	drm_WARN_ON(&i915->drm, event->parent);
+
 	module_put(THIS_MODULE);
 }
 
@@ -1058,8 +1062,10 @@ static int i915_pmu_register_cpuhp_state(struct i915_pmu *pmu)
 
 static void i915_pmu_unregister_cpuhp_state(struct i915_pmu *pmu)
 {
-	WARN_ON(pmu->cpuhp.slot == CPUHP_INVALID);
-	WARN_ON(cpuhp_state_remove_instance(pmu->cpuhp.slot, &pmu->cpuhp.node));
+	struct drm_i915_private *i915 = container_of(pmu, typeof(*i915), pmu);
+
+	drm_WARN_ON(&i915->drm, pmu->cpuhp.slot == CPUHP_INVALID);
+	drm_WARN_ON(&i915->drm, cpuhp_state_remove_instance(pmu->cpuhp.slot, &pmu->cpuhp.node));
 	cpuhp_remove_multi_state(pmu->cpuhp.slot);
 	pmu->cpuhp.slot = CPUHP_INVALID;
 }