mm/damon: fix a few spelling mistakes in comments and a pr_debug message

There are a few spelling mistakes in the code.  Fix these.

Link: https://lkml.kernel.org/r/20211028184157.614544-1-colin.i.king@gmail.com
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/damon/dbgfs-test.h b/mm/damon/dbgfs-test.h
index 104b229..86b9f95 100644
--- a/mm/damon/dbgfs-test.h
+++ b/mm/damon/dbgfs-test.h
@@ -145,7 +145,7 @@ static void damon_dbgfs_test_set_init_regions(struct kunit *test)
 
 		KUNIT_EXPECT_STREQ(test, (char *)buf, expect);
 	}
-	/* Put invlid inputs and check the return error code */
+	/* Put invalid inputs and check the return error code */
 	for (i = 0; i < ARRAY_SIZE(invalid_inputs); i++) {
 		input = invalid_inputs[i];
 		pr_info("input: %s\n", input);