[NET]: Do not check netif_running() and carrier state in ->poll()

Drivers do this to try to break out of the ->poll()'ing loop
when the device is being brought administratively down.

Now that we have a napi_disable() "pending" state we are going
to solve that problem generically.

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ixp2000/ixpdev.c

@@ -135,8 +135,6 @@ static int ixpdev_poll(struct napi_struct *napi, int budget)
 	struct net_device *dev = ip->dev;
 	int rx;
 
-	/* @@@ Have to stop polling when nds[0] is administratively
-	 * downed while we are polling.  */
 	rx = 0;
 	do {
 		ixp2000_reg_write(IXP2000_IRQ_THD_RAW_STATUS_A_0, 0x00ff);