treewide: Fix typo in printks

Correct spelling typos in printk and comments.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/tools/perf/tests/attr.c b/tools/perf/tests/attr.c
index bdcceb8..e825732 100644
--- a/tools/perf/tests/attr.c
+++ b/tools/perf/tests/attr.c
@@ -173,6 +173,6 @@
 	    !lstat(path_perf, &st))
 		return run_dir(path_dir, path_perf);
 
-	fprintf(stderr, " (ommitted)");
+	fprintf(stderr, " (omitted)");
 	return 0;
 }