input: sparse-keymap: use devm_kmemdup_array()

Convert to use devm_kmemdup_array() and while at it, use source size
instead of destination.

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Author: raagjadav

drivers/input/sparse-keymap.c

@@ -176,8 +176,7 @@ int sparse_keymap_setup(struct input_dev *dev,
 	for (e = keymap; e->type != KE_END; e++)
 		map_size++;
 
-	map = devm_kmemdup(&dev->dev, keymap, map_size * sizeof(*map),
-			   GFP_KERNEL);
+	map = devm_kmemdup_array(&dev->dev, keymap, map_size, sizeof(*keymap), GFP_KERNEL);
 	if (!map)
 		return -ENOMEM;