Fix MISRA rule 8.3 Part 1

Rule 8.3: All declarations of an object or function shall
          use the same names and type qualifiers.

Fixed for:

	make DEBUG=1 PLAT=fvp LOG_LEVEL=50 all

Change-Id: I48201c9ef022f6bd42ea8644529afce70f9b3f22
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
diff --git a/include/drivers/io/io_storage.h b/include/drivers/io/io_storage.h
index 50907ff..485ed8c 100644
--- a/include/drivers/io/io_storage.h
+++ b/include/drivers/io/io_storage.h
@@ -70,7 +70,7 @@
 /* Open a connection to a device */
 int io_dev_open(const struct io_dev_connector *dev_con,
 		const uintptr_t dev_spec,
-		uintptr_t *dev_handle);
+		uintptr_t *handle);
 
 
 /* Initialise a device explicitly - to permit lazy initialisation or