simple_lmk: Print a message when there are no processes to kill

Makes it clear that Simple LMK tried its best but there was nothing it
could do.

Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>

drivers/android/simple_lmk.c

@@ -165,8 +165,10 @@ static void scan_and_kill(unsigned long pages_needed)
 	read_unlock(&tasklist_lock);
 
 	/* Pretty unlikely but it can happen */
-	if (unlikely(!nr_victims))
+	if (unlikely(!nr_victims)) {
+		pr_err("No processes available to kill!\n");
 		return;
+	}
 
 	/* First round of victim processing to weed out unneeded victims */
 	nr_to_kill = process_victims(nr_victims, pages_needed);