pinctrl: at91: Delete an error message for a failed memory allocation in at91_pinctrl_mux_mask()

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/pinctrl-at91.c

@@ -1050,10 +1050,8 @@ static int at91_pinctrl_mux_mask(struct at91_pinctrl *info,
 	info->nmux = size / gpio_banks;
 
 	info->mux_mask = devm_kzalloc(info->dev, sizeof(u32) * size, GFP_KERNEL);
-	if (!info->mux_mask) {
-		dev_err(info->dev, "could not alloc mux_mask\n");
+	if (!info->mux_mask)
 		return -ENOMEM;
-	}
 
 	ret = of_property_read_u32_array(np, "atmel,mux-mask",
 					  info->mux_mask, size);