get rid of lkmc package, move userland and kernel-modules to top

Rationale: we already had a non buildroot build system,
maintaining both will be hard, and having short paths is more awesome.

kernel_modules/workqueue_cheat.c

@@ -0,0 +1,41 @@
+/* https://github.com/cirosantilli/linux-kernel-module-cheat#workqueues */
+
+#include <linux/delay.h> /* usleep_range */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h> /* atomic_t */
+#include <linux/workqueue.h>
+
+static struct workqueue_struct *queue;
+static atomic_t run = ATOMIC_INIT(1);
+
+static void work_func(struct work_struct *work)
+{
+	int i = 0;
+	while (atomic_read(&run)) {
+		pr_info("%d\n", i);
+		usleep_range(1000000, 1000001);
+		i++;
+		if (i == 10)
+			i = 0;
+	}
+}
+
+DECLARE_WORK(work, work_func);
+
+static int myinit(void)
+{
+	queue = create_workqueue("myworkqueue");
+	queue_work(queue, &work);
+	return 0;
+}
+
+static void myexit(void)
+{
+	atomic_set(&run, 0);
+	destroy_workqueue(queue);
+}
+
+module_init(myinit)
+module_exit(myexit)
+MODULE_LICENSE("GPL");