drm/i915/pmu: Fix wakeref leak in PMU busyness during reset

GuC PMU busyness gets gt wakeref if awake, but fails to release the
wakeref if a reset is in progress. Release the wakeref if it was
acquried successfully.

v2: Simplify the fix (Ashutosh)

Fixes: 2a67b18e67 ("drm/i915/pmu: Fix synchronization of PMU callback with reset")
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211207020239.43402-1-umesh.nerlige.ramappa@intel.com

drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c

@@ -1206,7 +1206,7 @@ static ktime_t guc_engine_busyness(struct intel_engine_cs *engine, ktime_t *now)
 	 * start_gt_clk is derived from GuC state. To get a consistent
 	 * view of activity, we query the GuC state only if gt is awake.
 	 */
-	if (intel_gt_pm_get_if_awake(gt) && !in_reset) {
+	if (!in_reset && intel_gt_pm_get_if_awake(gt)) {
 		stats_saved = *stats;
 		gt_stamp_saved = guc->timestamp.gt_stamp;
 		guc_update_engine_gt_clks(engine);