mtd: plat-ram: Remove casting the return value which is a void pointer

Casting the return value which is a void pointer is redundant.
The conversion from void pointer to any other pointer type is
guaranteed by the C programming language.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/maps/plat-ram.c

@@ -55,7 +55,7 @@ struct platram_info {
 
 static inline struct platram_info *to_platram_info(struct platform_device *dev)
 {
-	return (struct platram_info *)platform_get_drvdata(dev);
+	return platform_get_drvdata(dev);
 }
 
 /* platram_setrw