pinctrl: core: Delete an error message

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/core.c

@@ -1380,7 +1380,6 @@ int pinctrl_register_map(const struct pinctrl_map *maps, unsigned num_maps,
 		maps_node->maps = kmemdup(maps, sizeof(*maps) * num_maps,
 					  GFP_KERNEL);
 		if (!maps_node->maps) {
-			pr_err("failed to duplicate mapping table\n");
 			kfree(maps_node);
 			return -ENOMEM;
 		}