i915/perf: Drop the check for report reason in OA

After fixing the OA_TAIL_PTR corruption, there are no more reports with
reason field of zero. Drop the check for report reason.
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210210190106.8586-1-umesh.nerlige.ramappa@intel.com

drivers/gpu/drm/i915/i915_perf.c

@@ -725,11 +725,6 @@ static int gen8_append_oa_reports(struct i915_perf_stream *stream,
 			  (IS_GEN(stream->perf->i915, 12) ?
 			   OAREPORT_REASON_MASK_EXTENDED :
 			   OAREPORT_REASON_MASK));
-		if (reason == 0) {
-			if (__ratelimit(&stream->perf->spurious_report_rs))
-				DRM_NOTE("Skipping spurious, invalid OA report\n");
-			continue;
-		}
 
 		ctx_id = report32[2] & stream->specific_ctx_id_mask;