templates/memory_mapping: Make 'my_seq_show' call as a TODO

The document asks the user to implement 'single_open()' call as a part
of the task, but it is not removed in the skel.  This commit updates the
task to hide it and display as TODO.

Signed-off-by: SeongJae Park <sj38.park@gmail.com>

Author: sjp38

tools/labs/templates/memory_mapping/kmmap/kmmap.c

@@ -136,6 +136,7 @@ static int my_seq_show(struct seq_file *seq, void *v)
 
 static int my_seq_open(struct inode *inode, struct file *file)
 {
+	/* TODO 3: Register the display function */
 	return single_open(file, my_seq_show, NULL);
 }
 

tools/labs/templates/memory_mapping/vmmap/vmmap.c

@@ -137,6 +137,7 @@ static int my_seq_show(struct seq_file *seq, void *v)
 
 static int my_seq_open(struct inode *inode, struct file *file)
 {
+	/* TODO 3: Register the display function */
 	return single_open(file, my_seq_show, NULL);
 }