tools/perf: Fix misspellings in comments.

Signed-off-by: Adam Buchbinder <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

tools/perf/tests/openat-syscall-all-cpus.c

···
 	}
 
 	/*
-	 * Here we need to explicitely preallocate the counts, as if
+	 * Here we need to explicitly preallocate the counts, as if
 	 * we use the auto allocation it will allocate just for 1 cpu,
 	 * as we start by cpu 0.
 	 */

tools/perf/util/evsel.c

···
 		perf_evsel__set_sample_bit(evsel, PERIOD);
 
 	/*
-	 * When the user explicitely disabled time don't force it here.
+	 * When the user explicitly disabled time don't force it here.
 	 */
 	if (opts->sample_time &&
 	    (!perf_missing_features.sample_id_all &&

tools/perf/util/machine.c

···
 }
 
 /*
- * Caller must eventually drop thread->refcnt returned with a successfull
+ * Caller must eventually drop thread->refcnt returned with a successful
  * lookup/new thread inserted.
  */
 static struct thread *____machine__findnew_thread(struct machine *machine,

tools/perf/util/parse-events.c

···
 
 		buf = _buf;
 
-		/* We're cutting from the beggining. */
+		/* We're cutting from the beginning. */
 		if (err->idx > max_err_idx)
 			cut = err->idx - max_err_idx;
 

tools/perf/util/session.c

···
 
 /*
  * XXX this is hack in attempt to carry flags bitfield
- * throught endian village. ABI says:
+ * through endian village. ABI says:
  *
  * Bit-fields are allocated from right to left (least to most significant)
  * on little-endian implementations and from left to right (most to least