mtd: amd76xrom: remove unnecessary oom message

Fixes scripts/checkpatch.pl warning:
WARNING: Possible unnecessary 'out of memory' message

Remove it can help us save a bit of memory.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210610022631.15344-1-thunder.leizhen@huawei.com

drivers/mtd/maps/amd76xrom.c

@@ -189,10 +189,8 @@ static int amd76xrom_init_one(struct pci_dev *pdev,
 
 		if (!map) {
 			map = kmalloc(sizeof(*map), GFP_KERNEL);
-		}
-		if (!map) {
-			printk(KERN_ERR MOD_NAME ": kmalloc failed");
-			goto out;
+			if (!map)
+				goto out;
 		}
 		memset(map, 0, sizeof(*map));
 		INIT_LIST_HEAD(&map->list);