request_region janitor updates for sealevel wan driver

drivers/net/wan/sealevel.c

@@ -219,12 +219,11 @@ static struct slvl_board *slvl_init(int iobase, int irq, int txdma, int rxdma, i
 	 *	Get the needed I/O space
 	 */
 	 
-	if(check_region(iobase, 8))
+	if(!request_region(iobase, 8, "Sealevel 4021")) 
 	{	
 		printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n", iobase);
 		return NULL;
 	}
-	request_region(iobase, 8, "Sealevel 4021");
 	
 	b=(struct slvl_board *)kmalloc(sizeof(struct slvl_board), GFP_KERNEL);
 	if(!b)