net: wan: Use DEFINE_SPINLOCK() for spinlock

spinlock can be initialized automatically with DEFINE_SPINLOCK()
rather than explicitly calling spin_lock_init().
Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/wan/ixp4xx_hss.c

@@ -323,7 +323,7 @@ struct desc {
 
 static int ports_open;
 static struct dma_pool *dma_pool;
-static spinlock_t npe_lock;
+static DEFINE_SPINLOCK(npe_lock);
 
 static const struct {
 	int tx, txdone, rx, rxfree;
@@ -1402,8 +1402,6 @@ static int __init hss_init_module(void)
 	    (IXP4XX_FEATURE_HDLC | IXP4XX_FEATURE_HSS))
 		return -ENODEV;
 
-	spin_lock_init(&npe_lock);
-
 	return platform_driver_register(&ixp4xx_hss_driver);
 }