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: Zheng Yongjun <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/wan/ixp4xx_hss.c

···
 
 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;
···
 	     (IXP4XX_FEATURE_HDLC | IXP4XX_FEATURE_HSS)) !=
 	    (IXP4XX_FEATURE_HDLC | IXP4XX_FEATURE_HSS))
 		return -ENODEV;
-
-	spin_lock_init(&npe_lock);
 
 	return platform_driver_register(&ixp4xx_hss_driver);
 }