Add MODULE_DESCRIPTION to dummy-irq.c and lkdtm.c in drivers/misc

This starts to address
https://bugzilla.kernel.org/show_bug.cgi?id=10770

Signed-off-by: Terry Chia <terrycwk1994@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/dummy-irq.c b/drivers/misc/dummy-irq.c
index 4d0db15..acbbe03 100644
--- a/drivers/misc/dummy-irq.c
+++ b/drivers/misc/dummy-irq.c
@@ -61,3 +61,4 @@
 MODULE_AUTHOR("Jiri Kosina");
 module_param(irq, uint, 0444);
 MODULE_PARM_DESC(irq, "The IRQ to register for");
+MODULE_DESCRIPTION("Dummy IRQ handler driver");