coccinelle: pm_runtime: Insert blank line

Insert a blank line in order to improve the readability of the
generated patch and also make it consistent with the other
.cocci files.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>

scripts/coccinelle/api/pm_runtime.cocci

 /// Make sure pm_runtime_* calls does not use unnecessary IS_ERR_VALUE
-//
+///
 // Keywords: pm_runtime
 // Confidence: Medium
 // Copyright (C) 2013 Texas Instruments Incorporated - GPLv2.